🫁 VO2 Max Estimate
Cardio fitness level from run time
About this calculator
VO2 max is the maximum amount of oxygen your body can use during exercise — one of the best single measures of cardiovascular fitness. Enter your age, sex, resting heart rate, and activity details, and the calculator estimates your VO2 max using a validated formula (no lab test required), then grades it against norms for your age group. Higher numbers mean a stronger heart and lungs and are linked to longer life expectancy.
Tip: you don't need marathon training — regular brisk walking, cycling, or swimming raises VO2 max steadily over months.