VO2 Max Calculator
Estimate your VO2 max (aerobic fitness) from resting and maximum heart rate, with a fitness rating.
Estimated max heart rate: 190 bpm (220 − age)
Estimated VO2 max
44.7
ml/kg/min
Good
VO2 max measures how efficiently your body uses oxygen during intense exercise and is a key indicator of cardiovascular fitness. This calculator uses the non-exercise Uth-Sørensen-Overgaard-Pedersen formula, estimating max heart rate from age or using your own measured value. Calculated instantly in your browser.
How to use
- Choose whether to enter a known max heart rate or estimate it from age.
- Enter your resting heart rate, measured first thing in the morning for accuracy.
- Read your estimated VO2 max and fitness rating.
Frequently asked questions
- What is VO2 max?
- VO2 max is the maximum rate at which your body can consume oxygen during intense exercise, a widely used marker of aerobic fitness.
- How is VO2 max estimated without a lab test?
- This calculator uses the Uth-Sørensen-Overgaard-Pedersen formula, which estimates VO2 max from the ratio of max to resting heart rate.
- How accurate is an age-based max heart rate?
- The 220 minus age formula is a common estimate but can vary by 10-20 beats per minute between individuals; a measured max heart rate is more accurate.