VO2 Max Runners Calculator

Key Takeaways

What Is VDOT?

VDOT is a running-specific fitness metric developed by exercise physiologist Jack Daniels. Unlike laboratory VO₂max testing, VDOT is calculated from race performance and inherently captures both aerobic capacity and running economy—making it more practical for training prescription.^[1]

Two runners might have identical lab VO₂max values but different VDOT scores because one has better running economy. For a general (non-running-specific) aerobic fitness assessment, see our General VO₂ Max Calculator. For cycling-specific fitness, try the FTP Calculator.

Race Time Predictions

Once your VDOT is calculated, the model predicts equivalent performances at other distances. The assumption is that your training supports each distance equally—a pure 5K specialist may under-perform the marathon prediction, while a marathon runner may beat it.^[2]

Predictions are most accurate for distances close to your input race. The further the predicted distance from your input, the more training specificity matters. For heart rate-based training, see our Heart Rate Zone Calculator.

Training Pace Zones

• Easy (E): 59–74% VO₂max. Most of your weekly mileage. Builds aerobic base without excessive fatigue.
• Marathon (M): ~75–84% VO₂max. Specific preparation for marathon-pace running and fueling practice.
• Threshold (T): ~83–88% VO₂max. 20–40 minute sustained efforts or cruise intervals. Improves lactate threshold.
• Interval (I): ~95–100% VO₂max. 3–5 minute hard efforts with equal recovery. Develops VO₂max.
• Repetition (R): Faster than VO₂max pace. 200–400 m repeats. Develops speed, economy, and form.

Input Methods

Race Result: The most accurate method. Enter a recent race time from 1500 m to marathon distance. Use a race from the last 4–6 weeks for best accuracy.

Cooper Test: Run as far as possible in 12 minutes on a flat surface. Uses the Cooper formula: VO₂max = (distance_m − 504.9) / 44.73. Less precise than a race result but requires no racing.

Treadmill Test: Uses the ACSM running VO₂ equation based on speed and grade. Best when performed at maximal sustainable effort. For a dedicated running test, see the Cooper 12-Min Run Calculator.

How to Use This Calculator

1. Select your input method (race result, Cooper test, or treadmill test).
2. Enter your performance data—race distance and finish time, Cooper distance, or treadmill settings.
3. Review your VDOT score, classification, and race time predictions.
4. Use the training pace table to set appropriate workout intensities.
5. Retest every 4–8 weeks to track fitness improvements.