VO2 Max Estimator
Estimate aerobic fitness from resting and maximum heart rate.
Quick answer: enter your details below and click Estimate VO2 Max — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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How to use
- Enter your resting heart rate.
- Enter your maximum heart rate.
- Click Estimate VO2 Max.
About this tool
A simple heart-rate ratio formula estimates VO2 max as 15.3 times maximum heart rate divided by resting heart rate. Enter both rates and the tool returns the estimate with a broad fitness band. It is an estimate only — a lab test or a structured field test measures fitness more directly.
Frequently asked questions
How do I find my maximum heart rate?
From a hard effort test or a wearable's recorded peak, not just an age formula, which is itself an estimate.
Does a higher VO2 max mean healthier?
Generally fitter, but VO2 max is one marker among many, not a full health verdict.