VO2 Max Calculator

What is VO₂ max?

VO₂ max (maximal oxygen uptake) measures how efficiently your cardiovascular and muscular systems can deliver and use oxygen during sustained exercise. It is expressed in millilitres of oxygen per kilogram of body weight per minute (mL/kg/min). A higher VO₂ max indicates greater aerobic capacity.

Elite endurance athletes typically have VO₂ max values above 70 mL/kg/min for men and 60 mL/kg/min for women. Average untrained adults fall in the 35–45 mL/kg/min range. Values below 25 mL/kg/min are associated with increased cardiovascular risk.

Test methods

Cooper 12-minute run (Cooper 1968): Run as far as possible in 12 minutes. VO₂ max = (distance in metres − 504.9) ÷ 44.73. Simple to perform on any flat surface with a stopwatch.

1.5-mile run (George et al. 1993): Run 1.5 miles as fast as possible. VO₂ max = 3.5 + (483 ÷ time in minutes). Good for slightly shorter efforts.

Rockport walk test (Kline et al. 1987): Walk 1 mile as fast as possible, then record your heart rate immediately. The formula adjusts for age, sex, and weight — suitable for beginners or those who cannot run.

Heart rate ratio method (Uth et al. 2004): VO₂ max = 15 × (HRmax ÷ HRrest). A quick resting estimate that requires no physical test.

Improving your VO₂ max

VO₂ max is trainable. High-intensity interval training (HIIT), tempo runs, and long slow distance (LSD) training all contribute to improvements. Beginners can see gains of 15–20% with consistent aerobic training over 3–6 months. Highly trained athletes may improve by only a few percent despite significant effort.