◑ HEALTH Updated July 25, 2026

VO2 Max Calculator

A quick read on cardio fitness from two numbers.

Age
Resting heart rate (bpm)
Result
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How it works

The Uth-Sorensen formula estimates VO2 max as 15.3 times the ratio of maximum to resting heart rate, with maximum heart rate taken from the age-based 208 minus 0.7 times age equation.

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Frequently asked questions

How do I measure resting heart rate?

Count your pulse for a full minute first thing in the morning before getting out of bed.

How accurate is the estimate?

Within roughly 10-15% of a lab test — good enough to track your own progress over time.

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