VO2 Max Calculator
Estimate cardiovascular fitness from resting heart rate
Use this when you need a fast, accurate result — no sign-up, works entirely in your browser.
Estimated VO2 max (ml/kg/min)—
Cardio fitness category—
How to Use
- Enter your details into the fields above.
- Click the calculate button to get your result instantly.
- Use the clear button to start a new calculation.
Example
- Resting HR 70, age 30 → VO2 Max ≈ 40.71 ml/kg/min (good)
- Age 35, resting HR 55, male → VO₂ max ≈ 50.45 ml/kg/min (Excellent)
Formula
Uth–Sørensen formula: VO2 max = 15 × (HRmax / HRrest). HRmax = 220 − age. Tiers: >50 excellent, 40–50 good, 35–40 average, <35 below average. For a more rigorous test, use a treadmill or 12-minute Cooper test.
About VO2 Max Calculator
Estimate cardiovascular fitness from resting heart rate. This free online tool gives you fast, accurate results without registration or downloads.
Everything runs locally in your browser, so your data is never uploaded or stored — privacy first.
Frequently Asked Questions
Is this tool free to use? +
Yes, it is completely free with no registration or download required.
Is my data private? +
Yes. Everything is processed locally in your browser. Nothing is uploaded or stored on our servers.
Does it work on mobile? +
Yes, it works on any device — phone, tablet, or desktop.