🫁 VO2 Max: Calculator

Estimate your aerobic fitness level using the non-exercise heart rate ratio method.

yrs
bpm
bpm
ESTIMATED VO2 MAX
45.0 ml/kg/min
Average
Heart Rate Reserve
0 bpm
Estimate Method
Non-Exercise

What Is VO2 Max?

VO2 max is the maximum rate at which your body can consume oxygen during intense exercise, expressed in milliliters of oxygen per kilogram of body weight per minute (ml/kg/min). It's one of the most widely used indicators of cardiovascular fitness and aerobic endurance capacity.

How This Calculator Estimates VO2 Max

Lab testing (a treadmill test with a gas analyzer) gives the most accurate VO2 max reading, but it requires specialized equipment. This calculator uses a well-known non-exercise estimation formula developed by Uth, Sørensen, Overgaard, and Pedersen, which relates VO2 max to the ratio between your maximum and resting heart rate.

VO2 Max ≈ 15.3 × (Max Heart Rate ÷ Resting Heart Rate)

If you don't know your true max heart rate, the widely used (though approximate) formula 220 − age provides a reasonable estimate — this calculator can apply it automatically.

Why VO2 Max Matters

📎 Related Tools: Target Heart Rate Calculator BMR Calculator Calories Burned Calculator Body Fat Calculator

❓ Frequently Asked Questions

How accurate is this VO2 max estimate?
This non-exercise formula is a convenient estimate based on heart rate ratios and correlates reasonably well with lab-measured VO2 max for many people, but a supervised graded exercise test remains the gold standard for precision.
What's considered a good VO2 max?
It depends heavily on age, sex, and training status. Trained endurance athletes often score 'Excellent' or 'Superior' on standard scales, while sedentary adults typically fall in the 'Fair' to 'Average' range.
How can I improve my VO2 max?
Consistent aerobic training — especially interval training that pushes your heart rate near its maximum for short bursts — is one of the most effective ways to increase VO2 max over weeks to months.
Does VO2 max decline with age?
Yes, VO2 max typically declines gradually after your late 20s to early 30s, though regular cardiovascular exercise can significantly slow this decline.
What if I don't know my resting heart rate?
Measure your pulse first thing in the morning before getting out of bed, over a full 60 seconds, for several days and average the results for the most reliable resting heart rate value.

🏆 About This Tool — Accuracy & Trust

🔒 Data Privacy: All calculations run entirely within your browser using JavaScript. Nothing you enter here is ever transmitted to our servers, stored, sold, or shared.

📐 Accuracy Note: This tool uses standard, widely published formulas and guidelines. Results are estimates for informational purposes; for financial, medical, or engineering decisions, consult a licensed professional.

📅 Last Updated: September 2026.