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VO2max Calculator

Estimate your maximal oxygen uptake using the Cooper test, walk test, or a recent race result. Find out your fitness level and see how you compare to your age group.

What is VO2max and why does it matter?

VO2max — maximal oxygen uptake — measures how efficiently your body can transport and use oxygen during exercise. It is one of the most important indicators of cardiorespiratory fitness and a strong predictor of both athletic performance and long-term health.

Research suggests that VO2max is an even stronger predictor of health outcomes than smoking, diabetes, or high blood pressure. Even a modest improvement of 3–5 ml/kg/min can significantly reduce cardiovascular disease risk.

How to perform the Cooper test correctly

1

Warm up for 10–15 minutes with easy jogging and dynamic stretching.

2

Choose a flat surface (a running track is ideal). Use a watch or app to track time.

3

Run for exactly 12 minutes as far as possible. Aim for a steady, sustainable pace — avoid starting too fast.

4

Measure the total distance in metres. On a standard track, one lap is 400 metres.

5

Cool down for 5–10 minutes with easy walking.

How to improve your VO2max

🔥 Interval training

The most effective method for raising VO2max. The classic 4×4 minute interval at 90–95 % of max heart rate with 3 minutes of recovery has repeatedly proven to be the most powerful approach in research. Do this 2× per week.

🏃 Base endurance

Long, low-intensity runs in heart rate zone 2 build the aerobic foundation. They increase stroke volume and capillary density in muscles. Do this 2–3× per week for 45–90 minutes.

Frequently asked questions

VO2max (maximal oxygen uptake) is the maximum amount of oxygen your body can use per minute during intense exercise. It is expressed in ml/kg/min and is one of the most important measures of cardiorespiratory fitness.
A good VO2max depends on age and sex. For men aged 20–29, the average is about 43 ml/kg/min; for women it is about 36 ml/kg/min. An excellent level for men is above 51 ml/kg/min and for women above 44 ml/kg/min. Elite endurance athletes can reach 70–85 ml/kg/min.
In the Cooper test, you run as far as possible in 12 minutes. VO2max is then estimated using the formula: VO2max = (distance in metres − 504.9) / 44.73. The test is simple and reliable for estimating aerobic fitness. It should be performed on a flat surface at maximum sustainable effort.
Yes — VO2max can be improved through training. The most effective methods are interval training (e.g. 4×4 min hard + 3 min recovery), long base-endurance runs, and hill repeats. Beginners can improve VO2max by 15–20 % and experienced athletes by 5–10 % with the right training. Improvements are typically visible within 6–8 weeks.
Smartwatches estimate VO2max from the relationship between heart rate and running pace using algorithms similar to Firstbeat. They analyse heart rate variability and pace data. The estimate is indicative (±5 ml/kg/min) and less accurate than a laboratory test or a field test such as the Cooper test.
VO2max is one of the strongest predictors of longevity and overall health. Research shows that a high VO2max significantly reduces the risk of cardiovascular disease, diabetes, and premature death. Even a small improvement of 3–5 ml/kg/min can reduce mortality risk by 10–15 %.

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