Fitness Calculators & Tools
346+ science-backed calculators to optimize every aspect of your fitness journey. All free, all private, all accurate.
Browse by Category
Body Measurement & Proportion
Assess your body proportions, track measurements, and compare against scientifically established ideals.
Strength & Lifting Performance
Calculate your one-rep max, plan barbell loading, and structure your strength training programs.
Calories Burned
Estimate calories burned from walking and cardio sessions, and turn steps, distance, and calorie targets into easy-to-log activity references.
Workout Programming & Optimization
Optimize your workout variables including volume, intensity, recovery, warm-ups, and training intervals.
Fitness Assessment
Evaluate your aerobic endurance, muscular performance, and overall physical fitness with standardized tests.
Nutrition & Logging
Track macronutrients, plan calorie intake, and log nutrition data with conversion tools and goal-based calculators.
Conversion & Reference
Quickly convert between unit systems, translate barbell and dumbbell loads, and reference competition standards for powerlifting and Olympic weightlifting.
All Tools
Breath Count Calculator
Count your breaths per minute with a tap timer or manual entry. Classify your respiratory rate against population norms for rest and exercise.
Breath Hold Test Calculator — CO2 Tolerance
Test your CO2 tolerance with the breath hold assessment. Built-in stopwatch, classification against population norms, and breathing improvement tips.
Breathing Pattern Awareness Calculator
Analyze your breathing pattern with minute ventilation, alveolar ventilation, dead space calculations, and efficiency analysis.
Elderly Mobility Scale (EMS) Calculator
Assess functional mobility with the validated 7-item Elderly Mobility Scale. Score key daily movements and track mobility level over time.
Fasting Progress Tracker
Log your fasting days, track weight trends, monitor streaks, and review adherence over time. All data stored locally in your browser.
Fitness Age Calculator
Estimate your fitness age from resting heart rate, waist measurement, and activity level using the NTNU/CERG non-exercise VO2max model.
Sit-Ups Test Calculator
Evaluate abdominal muscular endurance with the standardized 1-minute sit-up test. Compare results against age and sex normative data.
Vegan Protein Calculator
Calculate daily plant-based protein needs with PDCAAS/DIAAS digestibility adjustment, per-meal targets, lysine requirements, and complementary protein pairing guide.
Water Fasting Weight Loss Calculator
Estimate daily weight change during a water-only fast with fat vs water breakdown, metabolic phase tracking, and post-refeed projection.
Weight Converter
Convert between kilograms, pounds, stone, ounces, and grams. Includes quick-reference table and barbell plate conversions.
Bike Size Calculator
Find your ideal bike frame size from height and inseam for road, mountain, gravel, hybrid, and TT bikes with fit preference adjustment.
Bike Tire Pressure Calculator
Calculate optimal front and rear tire pressure based on rider weight, tire width, bike type, tire setup, and surface conditions.
Calories to Steps Calculator
Convert a calorie target into walking or jogging steps using MET-based formulas. See how many steps to burn off meals with a food reference panel.
Cycling CdA Calculator
Estimate your cycling CdA from body dimensions and riding position, or back-calculate from power and speed data. Compare positions and see watt savings.
Cycling Race Predictor
Predict cycling race finish time from power output, weight, distance, elevation, and aerodynamic parameters. Includes pacing and what-if scenarios.
Cycling Rolling Resistance Calculator
Calculate rolling resistance force and watt cost from Crr, total weight, speed, and surface type. Compare tire options and see power impact.
Cycling Watts Calculator — CP & W'
Calculate Critical Power and W' (anaerobic work capacity) from 2–3 maximal time trial efforts using the 2-parameter power-duration model.
Erg-to-Boat Speed Calculator
Predict on-water boat speed from your ergometer 2K time. Weight-adjusted predictions for all boat classes (1x through 8+) with condition modifiers.
Erg-to-Run Equivalence Calculator
Convert rowing ergometer performance to equivalent running paces and race times. VO2max-based predictions and distance ratio conversion for cross-training.
NP & IF Estimator
Estimate Normalized Power from average power using ride profile presets. Calculate Intensity Factor and Training Stress Score for cycling rides.
Rowing Critical Power Calculator
Calculate rowing Critical Power (CP) and W' from 2-3 maximal erg efforts. Estimate FTP, get time-to-exhaustion predictions, and plan race pacing.
Rowing FTP Calculator
Estimate rowing Functional Threshold Power from a 20-min test, 2K erg score, or Critical Power. Get 6 structured training zones with watts and split targets.
Rowing Race Pace Calculator
Plan your rowing race pace with 500m-by-500m split targets. Choose even, negative, or controlled-start pacing strategies with power and stroke rate guidance.
Rowing Stroke Efficiency Calculator
Analyze rowing technique with Distance Per Stroke (DPS) and Stroke Power Index (SPI). Compare to elite benchmarks and get drill targets for improvement.
Saddle Height Calculator
Calculate optimal bike saddle height using three proven methods: Hamley (109%), LeMond (88.3%), and Heel (106.5%). Includes crank length adjustment.
5:2 & 4:3 Calorie Cycling Calculator
Plan your weekly calorie cycling schedule with the 5:2 or 4:3 protocol. Normal and restricted day calories, macro breakdowns, and a visual 7-day schedule.
Cycling RPE Calculator
Map cycling perceived exertion (RPE 1-10) to power zones, heart rate zones, and session training load using the Borg CR-10 scale.
Marathon Pace Calculator
Generate per-km and per-mile split tables with even, negative, or positive split strategies for marathon, half marathon, 10K, and 5K races.
RIR to RPE Calculator
Convert between Reps in Reserve and RPE scales, estimate %1RM from set data, and get suggested working weights based on your one-rep max.
RPE Load Calculator
Log weekly sessions and calculate total training load, monotony, and strain using the Foster session-RPE method with visual load distribution.
Running RPE Calculator
Map running perceived exertion (RPE 1-10) to training zones, heart rate ranges, and session training load using the Borg CR-10 scale.
Running Split Calculator
Generate per-km, per-mile, per-400m, or per-200m split tables for any distance from 200m track sprints to full marathon.
Bicep-to-Thigh Circumference Ratio Calculator
Compare upper and lower body proportionality with the 2:3 bodybuilding standard and bilateral symmetry analysis for left vs right balance.
Daily Steps Activity Level Classifier
Classify your daily step count into activity level tiers (sedentary to highly active) based on Tudor-Locke et al. research with distance and calorie estimation.
Multi-Sport Calorie Calculator
Estimate calories burned from 50+ sports across 8 categories using 2024 Compendium MET values with recreational, competitive, and vigorous intensity levels.
Muscle-to-Fat Ratio Calculator
Calculate your lean mass to fat mass ratio with InBody-style body shape classification (C-shape, I-shape, D-shape) and population reference ranges.
NEAT Calculator — Non-Exercise Activity Thermogenesis
Estimate daily calories from non-exercise activities with a granular breakdown by occupation, household, transport, leisure, and postural activity.
Scuba Diving Calorie Calculator
Estimate calories burned during scuba diving and snorkeling using 2024 Compendium MET values with water temperature and current adjustments.
Sled Push & Pull Calorie Calculator
Estimate calories burned from sled push, pull, and drag exercises using load-to-bodyweight ratio intensity tiers and surface friction adjustments.
Volume-to-Intensity Ratio Calculator
Analyze training sessions for total volume (tonnage), average intensity (%1RM), Prilepin zone classification, and session type identification.
Zig-Zag Calorie Calculator
Create a calorie cycling plan with high, medium, and low calorie days using Mifflin-St Jeor BMR. Aligns with your training schedule for weekly calorie budgets.
Caffeine Intake Calculator
Track daily caffeine intake from 20+ sources. See mg/kg ratio, compare to the 400 mg reference, and get personalized pre-workout dose ranges based on ISSN research.
Dynamic Strength Index (DSI) Calculator
Calculate the Dynamic Strength Index ratio from ballistic and isometric peak force. Get training emphasis classification and sport-specific benchmarks.
Jackson-Pollock 4-Site Skinfold Calculator
Estimate body fat percentage using the Jackson-Pollock 4-site skinfold method (1985). Uses tricep, suprailiac, abdomen, and thigh — same sites for both sexes.
Serving Size Calculator
Estimate serving sizes using the hand-portion method, household measures, and a 30+ food reference table. Build meals and track portions with macro estimates.
StairMaster Calories Burned Calculator
Calculate StairMaster calories burned by machine level (1-20), body weight, and duration. Includes step counts, handrail impact, and intensity zone classification.
Tai Chi Calories Burned Calculator
Estimate calories burned during tai chi by style (Yang, Chen, Seated, General) using MET values from the 2024 Compendium of Physical Activities.
AFT Calculator — Army Fitness Test
Score all 5 Army Fitness Test events (MDL, HRP, SDC, PLK, 2MR) with General and Combat MOS standards by age and sex.
Air Force PFA Calculator
Score the Air Force Physical Fitness Assessment across 4 components: Cardio (50pts), Body Comp/WHtR (20pts), Strength (15pts), Core (15pts).
APFT Calculator — Legacy Army Fitness Test
Score the legacy Army Physical Fitness Test using FM 21-20 tables. Push-ups, sit-ups, and 2-mile run with age/sex brackets.
Army Body Fat Calculator
Estimate body fat percentage using the AR 600-9 one-site tape test formula. Pass/fail against Army standards by age and sex.
Body Surface Area (BSA) Calculator
Estimate your total body surface area using three validated formulas: Du Bois, Mosteller, and Haycock. Compare results and see adult range context.
Caffeine Half-Life Calculator
Track your caffeine levels over 24 hours with multi-dose support, adjustable half-life, threshold tracking, and 17-source caffeine reference.
Calorie Deficit Calculator
Calculate your TDEE, daily calorie target, and projected timeline to reach your target weight with macro split recommendations.
Calorie Intake Calculator
Find out how many calories you need per day. Goal-adjusted calorie estimator using Mifflin-St Jeor, Harris-Benedict, and Katch-McArdle formulas.
Calorie Surplus Calculator
Estimate your daily calorie surplus target with Mifflin-St Jeor TDEE, 3 surplus rates, optimized macro split, and 16-week timeline projection.
Carb Calculator
Calculate daily carbohydrate intake by weight, calories, and activity goal. DRI and ACSM-based ranges with fiber targets and food references.
Fat Burning Zone Calculator
Estimate your fat burning heart rate zone using Tanaka and Fox max HR formulas with Karvonen method comparison and 4 training zones.
Fat Intake Calculator
Calculate your daily fat intake range based on IOM AMDR guidelines. Get total fat, saturated fat limit, per-meal targets, and essential fatty acid recommendations.
Food Points Calculator
Convert food nutrition into a simplified point score using a generic public-domain formula. Includes meal logger, daily budget guide, and 25-food reference.
Keto Calculator
Calculate your daily keto macros with TDEE, 3 keto presets (standard/moderate/liberal), adjustable carb limit, and 30-food keto reference table.
Macro Calculator
Calculate your custom macronutrient split with 7 presets or your own ratios. Get daily gram targets and per-meal breakdown for protein, carbs, and fat.
Magic Mile Calculator
Predict your race paces for 5K, 10K, half marathon, and marathon from a 1-mile time trial using Jeff Galloway's empirical multiplier formulas.
Net Carbs Calculator
Calculate net carbs by subtracting fiber and sugar alcohols. Includes 6 sugar alcohol impact factors, meal builder, keto badge, and 30-food reference table.
Protein Calculator
Calculate daily protein intake by body weight, activity level, and goal. ISSN-based ranges with per-meal targets and 20+ food references.
Sodium in Salt Calculator
Convert between salt and sodium using the NaCl 40% formula. Compare against WHO, AHA, and DGA daily limits with a 20-food sodium reference.
Two Rep Max (2RM) Calculator
Estimate your 2RM from any weight × reps using 6 validated prediction formulas (Epley, Brzycki, Lombardi, Lander, Mayhew, Wathan) with rep table and warm-up protocol.
Balke Treadmill Test Calculator
Estimate VO₂max and ACSM fitness classification from the Balke treadmill walking assessment using Pollock regression equations with age- and sex-specific norms.
Cadence & Stride Calculator
Explore the speed-cadence-stride triangle. Input any two values to calculate the third, with what-if analysis, ground contact time estimation, and optimal cadence ranges.
Cycling Critical Power Calculator
Derive Critical Power (CP) and W' from 3–6 maximal efforts using linear regression. Get power-duration predictions, time-to-exhaustion estimates, and a 6-zone training system.
Cycling Heart Rate Zone Calculator
Calculate personalized cycling heart rate zones with 4 methods: age-based, Karvonen, LTHR (Friel/Coggan), and Zoladz. Choose 5-zone or 7-zone system with cycling-specific HR offset.
Kosmin Test Calculator
Predict 800m and 1500m race times from repeated 60-second maximal efforts using sex-specific Kosmin regression formulas. Includes protocol guide and distance equivalents.
Run-Walk Pace Calculator
Calculate your effective pace and finish time using the Galloway run-walk method. Set custom ratios, estimate calories, and use the Magic Mile test for race predictions.
Running Age Grading Calculator
Compare your race performance across age groups using WMA age-grading factors. Get your age-graded time, percentage, performance level, and equivalent times at different ages.
Running Performance Calculator
Predict race times for any distance using the Riegel formula, estimate your VDOT fitness score, and get Daniels training paces from a single race result.
Tinman Running Calculator
Estimate vVO₂max from a race result and get four Tinman training pace zones — Easy, Critical Velocity, Interval, and Repetition — with CV workout suggestions.
Treadmill Pace Calculator
Convert treadmill speed to running pace, calculate grade-adjusted outdoor equivalent (GAP), estimate elevation gain, and compare calorie burn between incline and flat running.
ACFT Calculator
Score all 6 Army Combat Fitness Test events using FM 7-22 scoring tables. MDL, SPT, HRP, SDC, PLK, and 2MR with age/gender brackets and 3 MOS categories.
Activity to Steps Converter
Convert any physical activity into equivalent step counts using MET-based calculations. 30+ activities with multi-activity tracker and daily step goal comparison.
Anaerobic Threshold Heart Rate Calculator
Estimate your anaerobic threshold heart rate with 3 methods (age-based, Karvonen, 30-min time trial) and get a personalized 5-zone training system based on LTHR.
BCAA Dosage Calculator
Calculate your daily BCAA needs based on the 85 mg/kg research formula. 2:1:1 ratio breakdown, leucine threshold check, protein adequacy assessment, and food sources comparison.
Bruce Protocol METs Calculator
Estimate VO2max and METs from Bruce Protocol treadmill time using ACSM sex-specific formulas. 7-stage reference table and age-adjusted fitness classification.
Hansons Marathon Training Calculator
Calculate Hansons training paces from your goal marathon time or recent race. 4 pace zones, race equivalency table, SOS day structure, and optional heat adjustment.
Leg Press Weight Calculator
Estimate your leg press 1RM using Epley/Brzycki formulas, plan working weights, and compare strength to bodyweight-relative standards. Supports 45°, horizontal, and hack squat machines.
Navy PRT Calculator
Score all Navy Physical Readiness Test events using Guide 5A tables. Push-ups, forearm plank, and 4 cardio options with age/sex categories from Outstanding to Failure.
Physical Fitness Test Calculator
Comprehensive 5-domain fitness assessment: cardio, strength, endurance, flexibility, and body composition. Age/sex percentile scoring with composite fitness score.
Punch Force Calculator
Estimate punch force using impulse-momentum physics for 4 punch types. Effective mass model, experience level adjustment, and outputs in Newtons, lbs-force, Joules, and PSI.
Sleep Debt Calculator
Track your 7-day sleep patterns, calculate accumulated sleep debt, and get a personalized recovery plan. Consistency scoring, nap credit, and optimal bedtime suggestion.
Assault Bike Calorie Calculator
Estimate Assault Bike calories burned with ghost calorie deduction, RPM-to-watts tracking, interval HIIT mode, and cross-bike comparison.
BAI Calculator — Body Adiposity Index
Estimate body fat percentage from hip circumference and height using the Body Adiposity Index. Side-by-side BMI comparison with sex-specific classification.
BEE Calculator — Basal Energy Expenditure
Compare Original Harris-Benedict, Revised Harris-Benedict, and Mifflin-St Jeor BEE formulas. Activity and energy demand multipliers with weekly projections.
Body Frame Size Calculator
Determine your body frame size (small, medium, large) using wrist ratio, elbow breadth, and direct wrist methods with cross-validation.
Cooking Calorie Calculator
Estimate calories burned cooking, baking, grilling, and doing meal prep. Multi-task mode with daily/weekly projections and light activity comparison.
Muscle Fatigue Index Calculator
Track workout performance decay with Bosco jump test, rep-based fatigue, and power decay methods. Optimize rest periods and monitor work capacity.
Ponderal Index Calculator
Calculate your Ponderal Index (weight ÷ height³) alongside BMI. Height bias visualization shows fairer classification for tall and short individuals.
Total Body Water Calculator
Estimate total body water using Watson and Hume-Weyers formulas. Side-by-side comparison with intracellular/extracellular compartment breakdown.
VO2 Max Runners Calculator
Calculate your VDOT using the Jack Daniels model. Race time predictions for 1500m to marathon, plus Easy, Threshold, Interval, and Repetition training paces.
Volleyball Calorie Calculator
Calculate calories burned playing volleyball with beach, indoor, recreational, and water modes. Position modifiers, skill adjustment, and match-based tracking.
Cycling Power Speed Calculator
Convert watts to cycling speed or speed to required power using a physics-based model with grade, wind, riding position, and surface presets.
Height to Finger Length Calculator
Estimate finger length from height or height from finger length using regression equations. Proportion classification, comparison mode, and glove sizing reference.
Height to Wrist Circumference Calculator
Estimate wrist circumference from height or height from wrist size. Frame size classification, McCallum proportion preview, and watch sizing reference.
Cycling Miles to Steps Calculator
Convert cycling miles or duration to equivalent walking steps using distance-based and MET-equivalence methods. Find your 10,000-steps cycling target.
Crocheting Calories Burned Calculator
Calculate calories burned crocheting, knitting, and sewing with MET-based estimates by craft type, pattern complexity, and standing modifier.
Deadlift Calories Burned Calculator
Calculate calories burned deadlifting by variant (conventional, sumo, RDL, trap bar), intensity, sets × reps, and rest periods with EPOC afterburn estimates.
Farmer's Walk Calories Burned Calculator
Calculate calories burned doing farmer's walks and loaded carries by load-to-bodyweight ratio, carry mode, pace, and terrain with dynamic MET values.
Hand Size to Height Calculator
Estimate height from hand length using sex-specific regression equations with confidence intervals, hand span and breadth estimates.
Height to Hand Size Calculator
Estimate hand length, hand span, and hand breadth from your height using sex-specific regression equations with confidence intervals.
Hockey Calories Burned Calculator
Calculate calories burned playing ice hockey, field hockey, and street hockey with position-aware MET values, period structure, and active ice-time adjustments.
Jump Rope Calorie Calculator
Calculate calories burned jumping rope by speed, rope type, technique (double-unders, criss-cross), and HIIT interval mode with steps equivalence.
Lat Pulldown Calorie Calculator
Calculate calories burned doing lat pulldowns by grip variant, load intensity, and sets × reps with load-adjusted MET values.
Martial Arts Calories Burned Calculator
Calculate calories burned in martial arts training across 12 disciplines with session builder for warm-up, drilling, and sparring phases.
Rock Climbing Calories Burned Calculator
Calculate calories burned rock climbing by type (top-rope, lead, bouldering, outdoor), wall angle, and active vs rest/belaying time.
BJJ Calories Burned Calculator
Calculate calories burned in Brazilian Jiu-Jitsu by training type, Gi vs No-Gi, with a session builder and martial arts comparison.
Body Recomposition Calculator
Calculate calorie cycling targets for simultaneous fat loss and muscle gain with training/rest day macros, feasibility scoring, and 12-week projections.
Echo Bike Performance Calculator
Calculate echo bike watts from RPM, plan HIIT intervals, compare W/kg benchmarks, and estimate calorie targets on air bikes.
Eight Rep Max (8RM) Calculator
Estimate your 8RM from any weight × reps using 6 validated prediction formulas with rep-percentage table and warm-up protocol.
Hip Thrust Calories Burned Calculator
Estimate calories burned doing hip thrusts with MET-based calculations, sets × reps mode, and comparison to other glute exercises.
Hula Hoop Calories Burned Calculator
Calculate calories burned hula hooping by hoop type (standard, weighted, heavy), intensity level, and movement style with activity comparison.
Intermittent Fasting Calculator
Plan your intermittent fasting schedule with personalized eating windows, calorie and macro targets, meal timing, and protocol comparison.
Karvonen Heart Rate Calculator & Formula
Calculate personalized heart rate zones using the Karvonen (HRR) method with 6 MHR formulas and side-by-side Karvonen vs %MHR comparison.
Sprinting Calories Burned Calculator
Calculate calories burned sprinting with MET-based estimates, EPOC afterburn, sprint interval session builder, and activity comparison.
Sugar Intake Calculator
Calculate personalized daily sugar limits from WHO and AHA guidelines with intake comparison and 15+ common food sugar reference.
Vibration Plate Calories Burned Calculator
Estimate calories burned on a vibration plate with exercise type selection, frequency settings, and honest active vs passive comparison.
HIIT Timer
Run a premium HIIT timer with warm-up, work, rest, rounds, sets, cool-down, fullscreen mode, sound cues, and saved workouts.
6-Minute Walk Test Calculator
Calculate predicted 6-minute walk test distance using the Enright-Sherrill equations. Compare actual vs predicted, view age-decade reference values and classification bands.
Carb Cycling Calculator — High/Medium/Low Day Macro Planner
Plan your carb cycling schedule with personalized macro breakdowns for high, medium, and low carb days. Calculate TDEE, set goals, and use pre-built templates.
Creatine Dosage Calculator
Calculate personalized creatine monohydrate loading and maintenance doses based on body weight or lean body mass. Includes LBM-based precision dosing, phase timeline, and vegetarian/vegan adjustments.
Creatine Water Intake Calculator
Calculate total daily water needs when supplementing with creatine. Accounts for baseline, creatine dose, exercise intensity, and climate with a personalized hydration schedule.
Daily Energy Requirements Calculator (TDEE Components)
Calculate total daily energy expenditure broken into BMR, TEF, NEAT, and EAT components. Uses 5 BMR formulas with occupation-based NEAT and exercise-based EAT.
Echo Bike Calorie Calculator
Estimate calories burned on an echo bike, assault bike, or air bike with MET-based calculations, RPM-to-watts conversion, interval calculator, and HIIT templates.
ERG Calculator — Rowing Watts, Split & Distance Predictor
Convert between rowing watts and 500m split times, predict race distances with Paul's Law, and calculate training pace zones with stroke rate reference.
Paddle Boarding Calories Burned Calculator
Calculate calories burned paddle boarding across 10 SUP styles with water condition adjustments, session builder, and water sport comparisons.
Painting Calories Burned Calculator
Estimate calories burned while painting — artistic and house painting — with MET-based calculations, session builder, and activity comparisons.
Recumbent Bike Calorie Calculator
Calculate calories burned on a recumbent bike with 8 intensity levels, session builder for multi-intensity workouts, and recumbent vs upright bike comparison.
Target Heart Rate Zone Calculator
Calculate your 5 heart rate training zones using the Karvonen method with 4 MHR formulas (Tanaka, Gulati, Fox, HUNT). Includes goal-based recommendations and formula comparison.
Bulking Calories Calculator
Calculate your bulking calorie targets with TDEE, caloric surplus options (lean, standard, aggressive), macro breakdown, training/rest day split, and weight gain projections.
Dancing Calories Burned Calculator
Estimate calories burned dancing across 13 styles from waltz to Zumba to competitive DanceSport, with a multi-style session builder and MET-based calculations.
Deadlift One Rep Max Calculator
Estimate your deadlift 1RM with 6 formulas (Epley, Brzycki, more), variant conversion (conventional, sumo, trap bar), strength standards, and warm-up protocol.
Grams to Calories Calculator
Convert between grams and calories using Atwater factors for protein, carbs, fat, alcohol, and fiber, with a bi-directional mode and meal builder.
Harris-Benedict Equation Calculator
Calculate BMR with the Original (1919) and Revised (1984) Harris-Benedict equations, TDEE, Mifflin-St Jeor comparison, and goal-based calorie targets.
Ideal Weight Calculator
Calculate your ideal body weight using four validated formulas (Devine, Hamwi, Robinson, Miller) with BMI cross-check and frame size adjustment.
Lean Body Mass (LBM) Calculator
Calculate your lean body mass with four prediction formulas (Boer, James, Hume, Janmahasatian), a direct method from body fat %, and FFMI classification.
Mifflin-St Jeor Equation Calculator
Calculate your Resting Energy Expenditure and TDEE using the Mifflin-St Jeor equation, with Harris-Benedict comparison, goal adjustments, and macro suggestions.
RMR Calculator – Resting Metabolic Rate
Estimate your Resting Metabolic Rate with three formulas (Mifflin-St Jeor, Cunningham, Katch-McArdle), BMR comparison, and NEAT estimate.
Squat One Rep Max Calculator
Estimate your squat 1RM with 6 formulas (Epley, Brzycki, more), variant conversion (high-bar, low-bar, front squat), depth adjustments, strength standards, and warm-up ladder.
Weight Loss Percentage Calculator
Track your weight loss by percentage with milestones, pace classification, weekly rate analysis, goal projections, and a progress bar tracker.
Barre Calories Burned Calculator
Estimate calories burned during barre classes with 7 class types including cardio barre, HIIT fusion, and sculpt.
Calories Burned While Cleaning Calculator
Build a cleaning session with 12 household tasks and see per-task calorie breakdown with multi-room session support.
Digging & Shoveling Calories Burned Calculator
Estimate calories from digging and shoveling with 10 activity types, soil condition adjustments, and volume estimation.
Epley Formula Calculator
Estimate your 1RM using the Epley equation with six-formula comparison, rep-max table, training loads, and Epley vs Brzycki divergence.
Flutter Kicks Calories Burned Calculator
Estimate calories burned from flutter kicks with 5 variations and a reps-to-time converter for personal journaling.
Galpin Equation Calculator
Calculate personalized fluid intake during exercise using the Galpin Equation with intensity and environment adjustments.
Leg Raises Calories Burned Calculator
Estimate calories from leg raises with 7 variations including hanging, captain's chair, and weighted, plus reps-to-time converter.
Raking Calories Burned Calculator
Estimate calories from raking with 7 activity types, a yard-size duration guide, and leaf volume estimation.
Roller Skating Calories Burned Calculator
Estimate calories from roller skating across 8 quad-skate styles — recreational, derby, jam, artistic, and speed skating.
Side Bend & Side Crunches Calorie Calculator
Estimate calories from oblique exercises including side crunches, standing side bends, cable bends, and side plank crunches.
Spinning Calories Burned Calculator
Estimate calories from spinning with 8 class formats — beginner, endurance, HIIT, Tabata, hill climb, and power zone.
Stretching Calories Burned Calculator
Estimate calories burned stretching with 8 types and a flexibility session builder for mixed routines.
AMR (Active Metabolic Rate) Calculator
Calculate total daily energy expenditure from resting metabolism and activity level with goal-based calorie adjustments.
Brzycki Equation Calculator
Estimate your 1RM using the Brzycki formula with six-formula comparison, rep-max table, training loads, and divergence analysis.
Grip Strength Calculator
Assess grip strength with age-sex percentile rankings, classification, asymmetry analysis, and normative reference tables.
Hiking Time Calculator
Estimate hiking duration using Naismith's Rule and Tobler's function with terrain, fitness level, and pack weight adjustments.
Kayaking Calculator: Time, Pace & Performance
Calculate kayaking time, distance, or speed with adjustments for kayak type, water conditions, and experience. Includes calorie estimates.
Marathon Time Predictor
Predict marathon and race finish times from a known race result using the Riegel formula with experience-adjusted exponents.
REE (Resting Energy Expenditure) Calculator
Compare resting energy expenditure across four validated formulas: Mifflin-St Jeor, Harris-Benedict, Cunningham, and WHO/FAO.
Rest Time Between Sets Calculator
Get science-based rest period recommendations by training goal, exercise type, and intensity with PCr recovery tracking.
Running Pace Calculator
Calculate running pace, finish time, or distance with split tables, pace zones, and treadmill speed conversion.
Triathlon Race Time Calculator
Calculate triathlon race time with per-leg splits, transition times, and calorie estimates for Sprint, Olympic, 70.3, and Ironman distances.
Walking Time Calculator
Calculate walking time, distance, or pace with estimated steps, calorie burn, terrain adjustments, and per-kilometer splits.
Aquathlon Calories Burned Calculator
Estimate calories burned during an aquathlon (swim + run) with per-segment breakdown, stroke selection, and race presets.
Aquatic Cycling Calories Burned Calculator
Estimate calories burned during aquatic (underwater) cycling based on intensity, water resistance, and body weight.
Calories to Kilograms Converter
Convert calories to body fat kilograms using the 7,700 kcal/kg estimate with deficit timelines and quick-reference table.
Calories to Pounds Converter
Convert calories to body fat pounds using the 3,500 kcal/lb estimate with deficit timelines and quick-reference table.
Hot Tub Calories Burned Calculator
Estimate calories burned in a hot tub based on water temperature and duration, with comparison to walking and sauna exposure.
Hot Yoga Calories Burned Calculator
Estimate calories burned during hot yoga by style (Bikram, Hot Vinyasa, Hot Power, Hot Yin), body weight, and session duration.
Ice Bath Calories Burned Calculator
Estimate calories burned during cold water immersion factoring water temperature, cold-induced thermogenesis, and duration.
Kilograms to Calories Converter
Convert kilograms to calories using the 7,700 kcal/kg estimate with deficit timelines and quick-reference table.
Pounds to Calories Converter
Convert pounds to calories using the 3,500 kcal/lb estimate with deficit timelines and quick-reference table.
Sauna Calories Burned Calculator
Estimate calories burned during a sauna session (Finnish, infrared, steam room) using MET values from the 2024 Compendium.
Snowshoeing Calories Burned Calculator
Estimate calories burned snowshoeing with adjustments for snow condition (packed vs. powder) and terrain type.
Stride Length Calculator
Estimate your walking or running stride length from height, direct measurement, or speed and cadence. View step length, steps per mile/km, and reference table.
Anaerobic Threshold Calculator
Estimate your anaerobic threshold heart rate using Karvonen, %HRmax, or field test methods with a 5-zone training model.
Biathlon Calories Burned Calculator
Estimate calories burned during biathlon training or competition with separate skiing and shooting phase calculations.
High Knees Calories Burned Calculator
Estimate calories burned doing high knees by duration or rep count with pace-specific MET values.
Jogging in Place Calories Burned Calculator
Estimate calories burned jogging in place based on intensity, knee lift, and arm movement using MET values.
Medicine Ball Calories Burned Calculator
Estimate calories burned during medicine ball workouts by exercise type, ball weight, and intensity level.
Mountain Climbers Calories Burned Calculator
Estimate calories burned doing mountain climbers by duration or rep count with pace-specific MET values.
Running Cadence Calculator
Check, estimate, and optimize your running cadence with stride-cadence relationship calculations and impact reduction estimates.
Stationary Bike Calories Burned Calculator
Estimate calories burned on an exercise bike using wattage or perceived effort with bike-type adjustments.
Steam Room Calories Burned Calculator
Estimate calories burned in a steam room based on temperature, humidity, and duration with humidity-adjusted MET scaling.
Surfing Calories Burned Calculator
Estimate calories burned surfing with a phase-by-phase breakdown of paddling, wave riding, and rest periods.
Treadmill Elevation Gain Calculator
Calculate treadmill elevation gain from distance and grade, or solve for any variable with calorie burn estimates.
Workout Recovery Time Calculator
Estimate workout recovery time and readiness score based on training intensity, sleep, nutrition, age, and stress factors.
RFM Calculator — Relative Fat Mass (RFM1 & RFM2)
Calculate Relative Fat Mass using both RFM v1 (2018) and RFM v2 (2024) formulas. Includes DXA correlation context, waist-to-height ratio, multi-metric comparison, and age-specific reference ranges.
1.5-Mile Run VO₂ Max Test Calculator
Estimate your VO₂ max from your 1.5-mile run time. Get pace analysis, age- and sex-based classification, and Cooper 12-min distance equivalence.
Bike Pace Calculator
Convert cycling speed to pace (min/km or min/mi) and estimate race finish times for popular distances including 40 km TT and century rides.
Cycling Power Zones Calculator
Generate cycling training zones from your FTP. Coggan 7-zone model, Polarized 3-zone model, Sweet Spot watts, workout suggestions, and 80/20 distribution.
Cycling Power-to-Weight Calculator
Calculate your cycling power-to-weight ratio (W/kg) from FTP and body weight. See performance tier classification, climbing estimates, and what-if scenarios.
Cycling Time Calculator
Calculate cycling time, distance, or speed from any two known values. Includes split tables, grade adjustment, and average speed references.
Cycling TSS Calculator
Calculate your cycling Training Stress Score from ride power data and FTP. Understand Intensity Factor, training load categories, and recovery needs.
Durnin-Womersley 4-Site Skinfold Calculator
Calculate body fat percentage using the Durnin & Womersley 4-site skinfold method with age- and sex-specific coefficients and Siri/Brožek equations.
FTP Calculator — Functional Threshold Power
Estimate your cycling FTP from 20-min, 2×8-min, ramp, or 60-min test protocols with Coggan 7-zone training breakdown and Sweet Spot watts.
Jackson-Pollock 7-Site Skinfold Calculator
Calculate body fat percentage using the Jackson-Pollock 7-site skinfold method with age- and sex-specific regression equations and Siri/Brozek conversions.
Leg Press Max (1RM) Calculator
Estimate your leg press one-rep max from submaximal sets. Supports 45°, horizontal, vertical, single-leg, and hack squat variants with sled weight, training loads, and squat equivalence.
Leg Press to Squat Converter
Convert your leg press weight to an equivalent barbell back squat load. Accounts for sled weight, machine angle, bodyweight, and experience level.
Parrillo 9-Site Skinfold Calculator
Estimate body fat percentage using the Parrillo 9-site skinfold method. Includes regional fat distribution, classification bands, and fat/lean mass estimates.
Rucking Calorie Burned Calculator
Calculate calories burned while rucking using the Pandolf equation. Accounts for pack weight, speed, grade, and terrain with activity comparisons.
Squat to Leg Press Converter
Convert your barbell squat weight to an equivalent leg press load. Accounts for bodyweight, machine angle, and experience level.
Vertical Jump Calculator
Estimate peak power (Sayers, Harman) and average power (Lewis) from your vertical jump height and body weight. Includes sport-specific benchmarks and classification bands.
Thermic Effect of Food (TEF) Calculator
Calculate the thermic effect of food from your macro intake. Compare TEF across diet types with protein, carb, and fat coefficients from research.
Daily Water Intake Calculator
Calculate your daily water intake based on body weight, exercise, climate, and life stage. Includes timing schedule, hourly pace, and NASEM references.
10 Rep Max (10RM) Calculator
Calculate your 10 rep max from any submaximal set. Includes full rep-max table from 1RM to 20RM, training load guide, and formula comparison.
Squat to Deadlift Ratio Calculator
Convert between squat and deadlift weights using variant-specific ratios. Includes high-bar, low-bar, front squat, conventional, sumo, and trap bar combinations.
Jackson-Pollock 3-Site Body Fat Calculator
Estimate body fat percentage using the Jackson-Pollock 3-site skinfold method with the Siri equation. Gender-specific measurement sites with body composition breakdown.
YMCA Cycle Test Calculator
Estimate your VO2max from the YMCA submaximal bike test using the ACSM leg ergometry equation. Includes fitness classification by age and gender.
Dips One Rep Max (1RM) Calculator
Estimate your weighted dip one-rep max from submaximal sets. Includes parallel bar, ring, and bench dip variants with strength standards and training loads.
Romanian Deadlift to Deadlift Ratio Calculator
Convert Romanian deadlift weight to conventional or sumo deadlift equivalent and vice versa. Includes full variant matrix and muscle activation comparison.
Overhead Press (OHP) 1RM Calculator
Estimate your strict overhead press one-rep max from submaximal sets. Includes OHP strength standards by bodyweight and bench press ratio reference.
Front Squat to Back Squat Ratio Calculator
Convert front squat weight to back squat equivalent and vice versa. Adjusted for high-bar vs low-bar variant and squat depth.
Weighted Calisthenics 1RM Calculator
Estimate your one-rep max for weighted pull-ups, dips, muscle-ups, and push-ups using bodyweight plus added weight with standard 1RM formulas.
US Navy Body Fat Calculator
Estimate body fat percentage using the US Navy circumference method (Hodgdon-Beckett 1984). Uses neck, waist, and hip measurements with height.
Dumbbell Bench to Barbell Bench Converter
Convert dumbbell bench press weight to barbell bench press equivalent and vice versa. Adjusted for bench angle, gender, and experience level.
Katch-McArdle Calculator
Estimate resting metabolic rate using the Katch-McArdle equation with lean body mass. Includes TDEE activity multipliers and a guide to body fat estimation methods.
Rockport 1-Mile Walk Test Calculator
Estimate VO₂max using the Rockport 1-Mile Walk Test (Kline et al., 1987). Includes test protocol, pacing guide, normative tables, and MET conversion.
Reverse BMI Calculator
Calculate what weight corresponds to a target BMI at your height. Includes a weight range table and optional current weight comparison for personal reference.
Heart Rate Calorie Calculator
Estimate calories burned from average heart rate using the Keytel (2005) formulas. Includes optional VO₂max input, per-minute breakdown, and heart rate zone reference.
Cunningham Equation Calculator
Estimate resting metabolic rate using the Cunningham equation with lean body mass. Compare both the 1980 and 1991 formula versions with TDEE activity multipliers.
MET Calculator – Metabolic Equivalent Calorie Estimator
Estimate calories using MET values from the 2024 Compendium of Physical Activities. Build multi-activity sessions with 150+ activities for personal tracking.
VO2 Max Calculator
Estimate VO2 max with six test methods — Cooper 12-min, 1.5-mile run, Rockport walk, 20m Beep Test, Queens College Step Test, and Resting Heart Rate — with training zones, age percentiles, and vVO2max pace.
Kayaking Calories Burned Calculator
Estimate calories from flatwater, whitewater, and racing kayak sessions with water condition modifiers for personal journaling.
Rowing Calories Burned Calculator
Estimate calories from indoor ergometer and on-water rowing sessions across 8 intensity levels for personal journaling.
Sleeping Calories Burned Calculator
Estimate calories during sleep with MET-based and BMR-based methods for personal journaling.
Mowing the Lawn Calories Burned Calculator
Estimate calories from riding mower, power mower, and hand reel mower sessions with terrain modifier and yard size guide.
Gardening Calories Burned Calculator
Estimate calories from 16 gardening activities — digging, weeding, planting, raking, and more — for personal journaling.
Skating Calories Burned Calculator
Estimate calories from 15 skating types including ice, inline, skateboarding, and longboarding for personal journaling.
Skiing Calories Burned Calculator
Estimate calories from 17 skiing types including downhill, cross-country, and snowboarding with lift-time deduction for personal journaling.
Trampoline Calories Burned Calculator
Estimate calories from rebounding, recreational bouncing, and competitive training with time and interval modes for personal journaling.
3 Rep Max Calculator
Estimate 3RM from a recent set using 6 proven formulas, view a rep-percentage reference table, and save entries locally.
5 Rep Max Calculator
Estimate 5RM from a recent set using 6 proven formulas, get a suggested warm-up table, and save entries locally.
Barbell to Dumbbell Converter
Convert barbell weight to dumbbell weight per hand, adjusted for exercise type and experience level with practical rounding.
Dumbbell to Barbell Converter
Convert dumbbell weight per hand to estimated barbell weight, adjusted for exercise type and experience level with practical rounding.
Kg to Lb Powerlifting Converter
Precise kg-to-lb and lb-to-kg converter for powerlifting with competition plate chart, IPF weight classes, and common weights reference.
Sinclair Coefficient Calculator
Calculate your Sinclair coefficient and adjusted total for Olympic weightlifting, compare 2025-2028 and 2021-2024 cycles, and save entries locally.
Tennis Calories Burned Calculator
Estimate calories from singles, doubles, and practice sessions with time-based and set-based modes for personal journaling.
Driving Calories Burned Calculator
Estimate calories from car driving, riding, trucking, and motorcycle by time or distance for personal journaling.
Snow Shoveling Calories Burned Calculator
Estimate calories from hand shoveling, snow blowing, and roof raking with driveway size guide for personal journaling.
Hiking Calories Burned Calculator
Estimate calories from 6 hiking types with pack weight and trail condition adjustments for personal awareness.
Stair Climbing Calories Burned Calculator
Estimate calories by time or flights with 11 climb types including load carrying and stair machine.
Swimming Calories Burned Calculator
Estimate calories by stroke type, time or laps with 15 Compendium activities for personal awareness.
Treadmill Calories Burned Calculator
Estimate calories at any speed and incline with handrail adjustment for personal awareness and journaling.
Water Walking Calories Burned Calculator
Estimate calories from 7 water activities with depth and environment adjustments for personal awareness.
Climbing Hills Calories Burned Calculator
Estimate calories from hiking, hill walking, and mountain climbing by grade and load for personal journaling.
Boxing Calories Burned Calculator
Estimate calories from bag work, sparring, in-ring training, and round-based sessions for personal journaling.
Basketball Calories Burned Calculator
Estimate calories from games, drills, shooting practice, and more for personal journaling.
Badminton Calories Burned Calculator
Estimate calories from social, competitive, and match play badminton sessions for personal journaling.
Standing Calories Burned Calculator
Estimate calories from standing activities with a built-in sitting comparison for personal awareness.
Sitting Calories Burned Calculator
Estimate calories from desk work, reading, TV, studying, and more with a built-in standing comparison for personal awareness.
Zumba Calories Burned Calculator
Estimate calories from Zumba group classes, home video, Zumba Gold, Toning, Step, and Strong formats for personal journaling.
Yoga Calories Burned Calculator
Estimate calories from Hatha, Vinyasa, Power, Hot, Ashtanga, and Sun Salutation yoga by style and duration for personal journaling.
Aqua Aerobics Calories Burned Calculator
Estimate calories from water aerobics, water walking, water running, and pool resistance exercises for personal journaling.
Pilates Calories Burned Calculator
Estimate calories from mat, reformer, wall, and advanced Pilates by type, intensity, and duration for personal journaling.
Kettlebell Workout Calories Burned Calculator
Estimate calories from kettlebell exercises by type, weight, and duration for personal journaling.
Weightlifting Calories Burned Calculator
Estimate calories from weightlifting by training style, rep speed, and duration for personal journaling.
Circuit Training Calories Burned Calculator
Estimate calories from circuit training by type, intensity, and duration for personal journaling.
Plank Calories Burned Calculator
Estimate calories from plank holds by variation and duration for personal journaling.
Crunches Calories Burned Calculator
Estimate calories from crunch variations by reps, sets, or time for personal journaling.
Lunges Calories Burned Calculator
Estimate calories from lunge variations by reps, sets, or time for personal journaling.
Battle Rope Calories Burned Calculator
Estimate calories from battle rope exercises by wave pattern, rope weight, and duration with HIIT protocols and research citations for personal journaling.
Burpee Calories Burned Calculator
Estimate calories from burpee variations by reps, sets, or time for personal journaling.
Aerobic Stepper Calories Burned Calculator
Estimate calories from step aerobics by step height, intensity, and duration for personal journaling.
Sit-Up Calories Burned Calculator
Estimate calories from sit-up and crunch variations by reps, sets, or time for personal journaling.
Pull-Up Calories Burned Calculator
Estimate calories from pull-up and chin-up variations by reps, sets, or time for personal journaling.
Push-Up Calories Burned Calculator
Estimate calories from push-up variations by reps, sets, or time for personal journaling.
Home Activities Calories Burned Calculator
Estimate calories from cleaning, home repair, lawn and garden work, cooking, and childcare for personal journaling.
Exercise Calories Burned Calculator
Estimate calories from gym cardio, HIIT, circuit training, yoga, aerobics, and conditioning exercises for personal journaling.
Jogging Calories Burned Calculator
Estimate jogging calories from duration, speed, terrain, and body weight for personal journaling. Designed for casual and recreational jogging.
Running Calories Burned Calculator
Estimate running calories from speed, distance, duration, pace, terrain, treadmill incline, and body weight for personal journaling.
Cycling Calories Burned Calculator
Estimate cycling calories from speed, distance, duration, terrain, power output, and body weight for personal journaling.
Walking Calories Burned Calculator
Estimate walking calories from time, distance, pace, speed, steps, body weight, and optional treadmill grade for personal journaling.
Elliptical Calorie Calculator
Estimate calories burned on an elliptical using quick MET presets or advanced cadence and resistance inputs for personal journaling.
Steps to Kilometers Calculator
Convert steps into kilometers using estimated or custom step length, or reverse a kilometer target into steps for journaling.
Kilometers to Steps Calculator
Convert a kilometer target into a step goal using estimated or custom step length, with miles context included for journaling.
Miles to Steps Calculator
Convert a miles target into a step goal using estimated or custom step length, with kilometer context included for journaling.
Steps to Miles Calculator
Convert steps into miles or kilometers using estimated or custom step length, or reverse a distance target into steps for journaling.
Steps to Calories Calculator
Estimate walking calories from steps, pace, body weight, and step length, or reverse the estimate into a step goal for logging.
One Rep Max Calculator
Estimate 1RM from a recent set, compare multiple formulas, build rounded load tables, and save recent entries locally.
Wilks Calculator
Calculate Original Wilks and Wilks 2020 points from bodyweight and a powerlifting total or single result, compare versions, and save recent entries locally.
IPF Goodlift Points Calculator
Calculate official-style GL points for powerlifting totals or bench press results with classic or equipped profiles, target planning, and local history.
DOTS Calculator
Calculate a powerlifting DOTS score from bodyweight and total, compare direct totals or three-lift sums, and plan the total needed for a target DOTS.
Arm-to-Forearm Ratio Calculator
Track upper-arm and forearm proportions with a length-based brachial index mode and a circumference logging mode.
Smolov Jr Calculator
Generate a 3-week Smolov Jr schedule with configurable progression, rounded loads, and optional start dates for planning and journaling.
Body Roundness Index Calculator
Calculate BRI from waist and height, then log personal snapshots locally for trend awareness.
FFMI Calculator
Calculate Fat-Free Mass Index (FFMI) and normalized FFMI values for informational body-composition journaling.
Muscle Mass Calculator
Estimate skeletal muscle mass from anthropometric inputs and track personal trends with local journaling snapshots.
Ape Index Calculator
Calculate your ape index (arm span to height ratio) with sport-specific context for climbing, swimming, basketball, and combat sports.
Ideal Shoulder Size Calculator
Calculate your ideal shoulder width using height-based, anatomical, and golden ratio formulas. Compare to population averages by age and gender.
Neck to Waist Ratio Calculator
Calculate your neck-to-waist ratio to understand upper body proportions. Compare to population averages and the classic tailoring 2x reference.
Waist to Height Ratio Calculator
Calculate your waist-to-height ratio (WHtR) — a simple body proportion metric. Compare to the commonly referenced 0.5 benchmark and population averages.
Height to Forearm Length Calculator
Estimate forearm length from height or height from forearm length using regression equations. Get proportionality classification and practical applications.
Push-Up Test Calculator
Evaluate your upper body push-up performance using standardized norms and scoring.
Shoulder to Hip Ratio Calculator
Calculate your shoulder-to-hip ratio to evaluate your body frame and proportional balance.
Chest to Waist Ratio Calculator
Calculate your chest-to-waist ratio to measure your upper body V-taper and aesthetic proportions.
Waist to Hip Ratio Calculator
Calculate your waist-to-hip ratio (WHR) to track body proportions and distribution patterns.
Gym Workout Tracker
Track your gym workouts, log exercises, sets, reps, and weights with progress visualization.
Harvard Step Test Calculator
Evaluate your cardiovascular fitness using the Harvard Step Test with PFI score and VO2max estimation.
Height to Foot Size Calculator
Estimate foot size based on height, or compare your foot-to-height ratio against averages.
Shoulder to Height Ratio Calculator
Evaluate your shoulder width relative to your height to assess your overall body frame.
Online Interval Timer
Run a live interval timer with presets, custom phases, fullscreen controls, sound cues, and saved routines for workouts or focus sessions.
Ideal Forearm Size Calculator
Calculate your ideal forearm size using Steve Reeves, McCallum, height-based, and bicep-proportional formulas. Includes grip strength correlation, bicep-forearm balance meter, and population data by age.
Ideal Neck Size Calculator
Calculate your ideal neck size using Steve Reeves, McCallum, height-based, and head-based formulas. Includes metabolic syndrome risk screening, sleep apnea indicators, and population data by age.
Body Measurements Tracker
Track and monitor your body measurements over time with visual progress charts and trend analysis.
Ideal Physique Calculator
Calculate your ideal body measurements for a proportional and aesthetic physique based on your wrist and ankle size.
Japanese Interval Walking Calculator
Plan your Japanese interval walking sessions alternating between fast and slow walking intervals.
Physical Activity Calculator
Estimate calories burned and activity level based on your daily physical activities and exercises.
Queens College Step Test Calculator
Estimate your VO2max using the Queens College Step Test, a simple submaximal fitness assessment.
YMCA 3-Minute Step Test Calculator
Assess your cardiovascular fitness with the YMCA 3-Minute Step Test recovery heart rate method.
Zone 2 Heart Rate Calculator
Calculate your Zone 2 heart rate training range for optimal fat burning and aerobic base building.
Cooper 12-Minute Run Test Calculator
Estimate your VO2max and aerobic fitness level using the Cooper 12-Minute Run Test protocol.
Waist to Chest Ratio Calculator
Calculate your waist-to-chest ratio to evaluate upper body proportions and V-taper shape.
Deadlift Pyramid Calculator
Build a structured deadlift pyramid workout with ascending, descending, diamond, reverse pyramid, and wave loading options. RPE targets, volume tonnage, and NSCA-backed intensity guidelines.
Ideal Calf Size Calculator
Calculate your ideal calf size using Steve Reeves (Ankle × 1.92), McCallum, height-based, and symmetry formulas. Includes AWGS 2019 sarcopenia screening, population data, and ankle-based reference charts.
Ideal Thigh Size Calculator
Calculate your ideal thigh size using Steve Reeves (Knee × 1.75), McCallum, height-based, and chest-proportional formulas. Includes 60 cm cardiovascular health threshold from the Copenhagen Heart Study and population data.
Leg to Body Ratio Calculator
Calculate your leg-to-body ratio with population percentiles, health context, athletic implications, and a science-backed assessment based on ANSUR data.
Shoulder to Waist Ratio Calculator
Calculate your shoulder-to-waist ratio to assess your V-taper, get classification, improvement targets, and optional bonus health metrics like WHtR and WHR.
Tempo & TUT Calculator
Calculate time under tension from tempo notation, plan optimal tempos for your goals, and track total session TUT with three modes backed by research.
Torso to Leg Ratio Calculator
Calculate your torso-to-leg ratio for sport-specific body proportion analysis with biomechanical leverage insights and athletic recommendations.
5/3/1 Calculator
Generate your complete Wendler 5/3/1 program with training maxes, weekly percentages, and accessory recommendations.
5x5 One-Rep Max Calculator
Calculate your one-rep max from your 5x5 working weight using multiple proven formulas.
Adonis Index Calculator
Calculate your golden ratio proportions using the Adonis Index based on shoulder-to-waist measurements.
Average Torso Length Calculator
Calculate and compare your torso length against population averages based on height and gender.
Barbell Plate Calculator
Calculate which plates to load on each side of the barbell for any target weight. Includes visual diagram.
Bench Press Pyramid Calculator
Build a structured bench press pyramid workout with calculated sets, reps, and weights.
Grecian Ideal Calculator
Compare your body measurements against the classical Greek ideal proportions for the aesthetically perfect physique.
Ideal Arm Size Calculator
Calculate your ideal bicep and forearm size using Reeves, McCallum, and height-based formulas. Includes genetic ceiling, balance ratio, and population data charts.
Ideal Chest Size Calculator
Calculate your ideal chest size using Steve Reeves, McCallum, and height-based formulas. Includes population data charts, body type adjustments, and gap analysis.
Ideal Hip Size Calculator
Calculate your ideal hip size using Steve Reeves and height-based formulas. Includes WHR health assessment, population data charts, and gap analysis.
Ideal Waist Size Calculator
Calculate your ideal waist size using WHtR and height-based formulas. Includes WHO risk thresholds, health risk zones, and CDC population data charts.
Muscle Recovery Calculator
Determine optimal rest periods between workouts based on muscle group, intensity, and training experience.
Overtraining Calculator
Assess your risk of overtraining based on training load, recovery, sleep, and lifestyle factors.
Progressive Overload Calculator
Plan your strength progression with calculated weight increases for continuous gains.
RPE to %1RM Calculator
Convert your RPE-based lifts to estimated one-rep max percentages using standard RPE charts.
Sets and Reps Calculator
Find the optimal sets and reps for your training goals, whether strength, hypertrophy, or endurance.
Squat Pyramid Calculator
Create a structured squat pyramid training program with calculated sets, reps, and weights.
Training Volume Calculator
Track and optimize your weekly training volume per muscle group for maximum gains.
Workout Intensity Calculator
Monitor and adjust your training intensity to optimize workout effectiveness and avoid burnout.
Workout Warm-Up Calculator
Calculate optimal warm-up sets, weights, and reps to prepare for your working weight safely.