VO2 Max Calculator
Estimate VO2 max from a timed run or Cooper 12-minute test.
Returns aerobic fitness class by age and sex, predicted race paces, and training zone heart rates.
VO2 max is the maximum rate at which your body can consume oxygen during intense exercise. It’s the gold standard measure of cardiovascular fitness, expressed in milliliters of oxygen per kilogram of body weight per minute (mL/kg/min).
The Cooper 12-Minute Run Formula (field test):
VO2 max = (Distance in meters − 504.9) / 44.73
The Rockport Walk Test Formula:
VO2 max = 132.853 − (0.0769 × Weight in lbs) − (0.3877 × Age) + (6.315 × Sex [0=F, 1=M]) − (3.2649 × Walk time in minutes) − (0.1565 × Heart rate at finish)
The Heart Rate Reserve Method (Uth-Sørensen-Overgaard-Pedersen):
VO2 max = 15 × (Max HR / Resting HR)
Worked Example (Cooper Test):
A runner covers 2,800 meters in 12 minutes:
VO2 max = (2,800 − 504.9) / 44.73 = 2,295.1 / 44.73 = 51.3 mL/kg/min
Fitness Classification (men, age 30–39):
| VO2 Max | Rating |
|---|---|
| Below 35 | Poor |
| 35–40 | Fair |
| 40–45 | Good |
| 45–50 | Excellent |
| Above 55 | Elite |
Women’s values are typically 10–15% lower due to differences in hemoglobin concentration and muscle mass.
Practical Tips:
- Elite male endurance athletes often exceed 70–80 mL/kg/min; Kipchoge tested at ~92
- VO2 max can improve 15–20% with consistent aerobic training over 3–6 months
- High-intensity interval training (HIIT) is the most efficient method for raising VO2 max
- Track it every 8–12 weeks to measure fitness gains