VO₂ max calculator.
Estimate your aerobic fitness with two established field tests: the Cooper 12-minute run or the Rockport 1-mile walk.
Free calculator
Estimates for general guidance, not medical advice. See the medical disclaimer and sources.
How it works
The formula.
Cooper uses (metres − 504.9) ÷ 44.73. Rockport uses your weight, age, sex, walk time and finishing heart rate.
Questions
Frequently asked
What is VO₂ max?
It is the most oxygen your body can use during hard exercise, a widely used marker of aerobic fitness.
Which test should I choose?
Cooper suits people comfortable running hard for 12 minutes. Rockport is a brisk 1-mile walk and asks less of you.
Can Apple Watch test my VO₂ max?
Yes. The Ritual watch app runs guided VO₂ max tests and sends the result to your iPhone.
Ritual for iPhone and Apple Watch
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