VO2 Max Calculator (Heart Rate Ratio Method)
Measure this first thing in the morning while lying in bed.
If unknown, use the formula: 220 – your age.
Your Estimated VO2 Max:
—
mL / kg / min
Understanding VO2 Max via Heart Rate Ratio
VO2 max is the maximum amount of oxygen your body can utilize during intense exercise. It is widely considered the gold standard for measuring cardiovascular fitness and aerobic endurance.
The Uth-Sørensen Formula
This calculator uses the Uth-Sørensen-Overgaard-Pedersen formula, which provides a highly reliable estimate based on the relationship between resting heart rate and maximum heart rate. The mathematical expression is:
VO2 Max = 15.3 x (HRmax / HRrest)
Key Variables Explained
- Resting Heart Rate (HRrest): The number of times your heart beats per minute while at complete rest. A lower resting heart rate typically indicates better cardiovascular efficiency.
- Maximum Heart Rate (HRmax): The highest heart rate an individual can safely achieve through exercise stress. While the "220 – age" formula is a common estimate, actual clinical testing provides the most accurate figure.
VO2 Max Classifications
Generally, for a male aged 30-39:
| Category | Score (mL/kg/min) |
|---|---|
| Poor | < 35 |
| Fair | 35 – 39 |
| Good | 40 – 44 |
| Excellent | 45+ |