Body Measurement & Proportion
Assess your body proportions, track measurements, and compare against scientifically established ideals.
54 calculators available
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.
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.
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.
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.
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.
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.
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.
Body Frame Size Calculator
Determine your body frame size (small, medium, large) using wrist ratio, elbow breadth, and direct wrist methods with cross-validation.
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.
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.
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.
Ideal Weight Calculator
Calculate your ideal body weight using four validated formulas (Devine, Hamwi, Robinson, Miller) with BMI cross-check and frame size adjustment.
Weight Loss Percentage Calculator
Track your weight loss by percentage with milestones, pace classification, weekly rate analysis, goal projections, and a progress bar tracker.
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.
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.
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.
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.
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.
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.
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.
Arm-to-Forearm Ratio Calculator
Track upper-arm and forearm proportions with a length-based brachial index mode and a circumference logging mode.
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.
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.
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.
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.
Waist to Chest Ratio Calculator
Calculate your waist-to-chest ratio to evaluate upper body proportions and V-taper shape.
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.
Torso to Leg Ratio Calculator
Calculate your torso-to-leg ratio for sport-specific body proportion analysis with biomechanical leverage insights and athletic recommendations.
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.
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.