VO₂ Max Calculator
Estimate your VO₂ max from five field tests and see how it ranks for your age and sex.
Your test
No test needed (just your resting and maximum pulse)
Compared against an estimated maximum of 184 bpm
These are field-test estimates, and they carry error of roughly 10–15% against a proper laboratory test with a gas mask on a treadmill. The Cooper and 1.5-mile tests are maximal efforts: do not attempt them if you are unfit, unwell, or have heart disease.
This estimates VO2 max from a field test or from your resting and maximum heart rates.
It shows the result in ml/kg/min and where it sits against age and sex norms.
What VO2 max measures
VO2 max is the maximum volume of oxygen your body can use per minute during all-out effort, expressed in millilitres per kilogram of body weight per minute. It is the standard measure of aerobic fitness.
It matters well beyond sport. VO2 max is among the strongest predictors of all-cause mortality in the research literature, and the gap between low and moderate fitness carries a larger associated risk difference than smoking, diabetes or hypertension in several large cohort studies.
Unlike maximum heart rate, which is largely fixed by genetics, VO2 max responds strongly to training. Improvements of 15-20% over a few months are common in previously untrained people.
The Cooper test requires a hard 12-minute effort. The heart rate method needs only a resting and maximum rate, and is correspondingly rougher.
What to enter
- Test distance and time
- For the Cooper test, the distance covered in 12 minutes of maximal effort, in metres.
- Resting heart rate
- Measured on waking, before getting up, ideally averaged over several mornings.
- Maximum heart rate
- Measured if you have it, or estimated. The Tanaka equation is more accurate than 220 − age.
- Age, sex and weight
- Used for comparing against norms, and weight is already built into the ml/kg/min unit.
Rough VO2 max norms (ml/kg/min)
- Untrained adult
- Roughly 30-40 for men and 27-35 for women, varying considerably with age.
- Recreationally active
- About 40-50 for men and 35-45 for women.
- Well trained
- 50-60 and above, typical of committed endurance athletes.
- Elite endurance
- 70-85+. Values above 80 are rare and largely genetic in origin.
- The direction of travel
- VO2 max declines with age, and training substantially slows that decline.
What this assumes
Field tests and heart-rate methods are estimates. Laboratory testing with gas analysis is the accurate measurement.
The Cooper test requires a genuine maximal effort. A paced or conservative attempt underestimates, sometimes badly.
How to calculate your VO2 max
Either run a 12-minute test, or use the ratio between your maximum and resting heart rates.
- metres
- Distance covered in 12 minutes of maximal effort
- HRmax / HRrest
- Maximum and resting heart rates in beats per minute
Choose a method. The Cooper test is more accurate and requires a hard effort. The heart-rate method needs no test at all and is rougher.
For the Cooper test, warm up and go hard. Cover as much ground as you can in 12 minutes on a track or flat measured route. Pacing conservatively underestimates the result.
Apply the formula. 2,400 m gives (2,400 − 504.9) ÷ 44.73 = 42.4 ml/kg/min.
Compare against your age and sex. The absolute number means little without that context. Then retest in 8-12 weeks to see the trend.
See a worked example: the same runner, two methods
- Cooper test
- 2,400 m in 12 minutes
- Heart rate
- Max 190, resting 60
Cooper: (2,400 − 504.9) ÷ 44.73 = 42.4 ml/kg/min.
Heart rate ratio: 15 × (190 ÷ 60) = 47.5 ml/kg/min.
A 5-point spread between methods is normal, which tells you how to read either: as a range, and as a baseline to improve on.
Covering 2,800 m instead would give 51.3, so 400 m of improvement is worth nearly 9 points.
About 42-48 ml/kg/min
Frequently asked questions
It depends heavily on age and sex, so norms matter more than the raw figure. Roughly, 40-50 for men and 35-45 for women is recreationally fit; above 50 and 45 respectively is well trained.
The more useful question is where you sit for your age and whether it is rising. Being in a higher fitness category for your age group is what the mortality research actually tracks.
Yes, substantially. Untrained people commonly gain 15-20% over a few months of consistent aerobic training, and it is one of the most trainable measures in physiology.
Both ends of the intensity range contribute: high-intensity intervals drive rapid gains, and a large base of easy aerobic work sustains them. Doing only one tends to plateau.
Reasonable for tracking change, less so as an absolute number. Watches infer VO2 max from heart rate against pace, so anything that disturbs either disturbs the estimate.
Hills, heat, wind and a poorly-fitting optical sensor all skew it. Use the trend across weeks rather than reacting to a single reading.
It reflects the integrated capacity of the heart, lungs, blood and muscles working together, so it captures overall physiological function in a single measure.
Large cohort studies have consistently found strong associations between low cardiorespiratory fitness and all-cause mortality, with effect sizes comparable to or larger than established risk factors. The gain from moving out of the lowest fitness category is the largest single step.
Yes, typically around 10% per decade after roughly age 30 in sedentary people.
Training slows it considerably. Older athletes routinely record values above sedentary people decades younger, so the decline is much less fixed than it appears.
A laboratory graded exercise test with gas analysis, on a treadmill or bike with a mask measuring oxygen and carbon dioxide. That is a measurement rather than an estimate.
It requires a maximal effort under supervision. Field tests and watch estimates are what most people should use, provided they are read as estimates.
Problems people actually run into
Pacing the Cooper test
The test assumes a genuine maximal 12-minute effort. Running it comfortably, or fading badly in the last three minutes, both underestimate the result.
Warm up properly and aim to finish barely able to continue. It is an unpleasant test, and that is what makes it informative.
Comparing your number to an elite one
Elite endurance athletes record 70-85+, and a large part of that is genetic. Measuring yourself against it is discouraging and tells you nothing useful.
The change that matters most for health is moving out of the lowest fitness category for your age, and that is achievable for almost anyone with consistent training.
Results are estimates for general information only and are not professional financial, medical, or legal advice. Read our full disclaimer.
Last updated: September 4, 2026