VO2 Max Calculator
A 30-year-old with a resting heart rate of 60 has an estimated VO2 max of about 48.5 mL/kg/min. This vo2 max calculator uses the resting heart rate method to estimate your aerobic fitness from your age and resting pulse. It gives a quick benchmark you can track over time without a lab test.
Quick answer
VO2 max is the maximum oxygen your body can use during hard exercise.
What this tells you
- •VO2 max is the maximum oxygen your body can use during hard exercise.
- •This method estimates it from the ratio of maximum to resting heart rate.
- •A lower resting heart rate usually points to a higher estimated VO2 max.
- •Use the number to track trends, not as a clinical measurement.
How to Use
- 1Enter your age in years.
- 2Enter your resting heart rate in beats per minute.
- 3For the best resting reading, measure your pulse after waking, before getting up.
- 4Calculate to see your estimated VO2 max and fitness category.
How It Works
Formula
VO2 max = 15.3 x (maxHeartRate / restingHeartRate), maxHeartRate = 220 - ageThe Uth-Sorensen-Overgaard-Pedersen method estimates maximum heart rate as 220 minus age, then multiplies the ratio of maximum to resting heart rate by 15.3. A fitter heart beats more slowly at rest, which raises the estimate.
Calculation note: values are processed in the order shown above, using the current input units.
Worked Examples
Active 30-year-old
Maximum heart rate is 190. Then 15.3 times 190 divided by 60 is about 48.5.
Well-trained 20-year-old
A low resting pulse of 50 with a maximum heart rate of 200 gives a high estimate.
VO2 Max Fitness Categories
Category bands used by this estimator, in mL/kg/min.
| VO2 max | Category |
|---|---|
| Under 30 | Below average |
| 30 to 40 | Average |
| 40 to 50 | Good |
| 50 and above | Excellent |
Common mistakes
- Measuring resting heart rate after activity or coffee, which inflates the reading.
- Treating the estimate as an exact lab value rather than a trend indicator.
- Entering maximum heart rate instead of resting heart rate.
Limitations
This calculator estimates VO2 max from age and resting heart rate only. It does not account for training history, body composition, altitude, medication, or a measured maximum heart rate. Age-based maximum heart rate is itself an approximation, so results can differ by several points from a laboratory test.