VO2 Max Calculator

About the VO2 Max Calculator

VO2 max is the maximum rate at which your body can take in and use oxygen during hard exercise, measured in millilitres of oxygen per kilogram of bodyweight per minute (ml/kg/min). It is the best single measure of aerobic fitness: the higher it is, the more energy your heart, lungs and muscles can produce aerobically. It is used to guide endurance training, and higher values are linked with better long-term health.

Measuring VO2 max directly needs a laboratory treadmill test with a mask that analyses your breathing. This VO2 max calculator estimates it instead from four well-known field tests you can do yourself: the Cooper 12-minute run, the 1.5-mile run, the Rockport one-mile walk and the heart rate ratio method.

How to Use the VO2 Max Calculator

Choose a test.

Cooper 12-minute run: enter the distance you covered in 12 minutes, in metres or miles.

1.5-mile run: enter your time.

Rockport walk: enter your age, sex, weight, the time to walk one mile as fast as you can, and your heart rate at the end.

Heart rate: enter your resting heart rate and either your age or your measured maximum heart rate.

The Formulas

  Cooper 12-minute run   VO₂max = (distance in metres − 504.9) ÷ 44.73
  1.5-mile run           VO₂max = 3.5 + 483 ÷ time in minutes
  Rockport walk          VO₂max = 132.853 − 0.0769 × weight (lb) − 0.3877 × age
                                  + 6.315 × (1 for men, 0 for women)
                                  − 3.2649 × time (min) − 0.1565 × heart rate
  Heart rate (Uth)       VO₂max = 15.3 × maximum HR ÷ resting HR
  Maximum HR (Tanaka)    208 − 0.7 × age

Step-by-Step Examples

Cooper test: 2,400 metres in 12 minutes.

  (2,400 − 504.9) ÷ 44.73 = 42.4 ml/kg/min

Covering 2,800 metres gives about 51.3 ml/kg/min.

1.5-mile run in 12:00.

  3.5 + 483 ÷ 12 = 43.75 → 43.8 ml/kg/min

Rockport walk: a 40-year-old man weighing 70 kg (154.3 lb) walks the mile in 15:00 with a heart rate of 120 at the finish.

  132.853 − 0.0769 × 154.3 − 0.3877 × 40 + 6.315 − 3.2649 × 15 − 0.1565 × 120
  = 44.0 ml/kg/min

Heart rate method: a 30-year-old with a resting heart rate of 60.

  maximum HR   208 − 0.7 × 30 = 187 bpm
  VO₂max       15.3 × 187 ÷ 60 = 47.7 ml/kg/min

Choosing a Test

The Cooper and 1.5-mile tests are the most accurate of the four for people who can run hard for 10 to 15 minutes, but they are all-out efforts. The Rockport walk is designed for people who are less fit, older or unable to run, and needs a heart rate monitor or a careful pulse count at the finish. The heart rate method needs no exercise at all, but it is the least precise, because resting and maximum heart rate vary between people for reasons that have nothing to do with fitness. Whichever you choose, use the same test each time so your results are comparable.

What Is a Good VO2 Max?

VO2 max depends strongly on age, sex and training. As a rough guide, untrained adults are often in the 30s for men and the high 20s to low 30s for women. Fit recreational runners and cyclists are commonly in the 40s and 50s, and elite endurance athletes reach about 70 to 85 ml/kg/min. VO2 max declines gradually with age, typically by about 10 percent per decade in inactive adults, but regular training slows that fall considerably.

Improving Your VO2 Max

Endurance training raises VO2 max, especially for people starting from a low base. Regular moderate running, cycling or swimming builds the foundation, and interval training — repeated hard efforts of 2 to 5 minutes near your maximum, with recovery between — is one of the most effective ways to push it higher. Losing excess body fat also raises VO2 max per kilogram, since the same oxygen uptake is divided by a lower weight.

How to Do the Tests Well

Warm up for 10 to 15 minutes with easy running or walking and a few short, faster strides before any test. For the Cooper test, run on a 400-metre track if you can, count the laps and add the part of the last lap covered when the 12 minutes end. Pace yourself so you can hold the effort, but finish with nothing left. For the 1.5-mile run, six laps of a standard track is almost exactly the distance. For the Rockport walk, walk as fast as you can without breaking into a jog, and take your pulse for 15 seconds immediately at the finish, multiplying by four, unless you wear a heart rate monitor. Test in similar weather and at a similar time of day each time.

VO2 Max and Health

VO2 max is not only an athletic measure. Large studies have found that higher cardiorespiratory fitness is linked with lower risks of heart disease and early death, even after allowing for other risk factors. Moving from the least fit group to a moderate level of fitness seems to bring the largest benefit, so improving from a low starting point is especially worthwhile. If you have a heart condition, are unused to exercise or have any symptoms such as chest pain or unusual breathlessness, check with a doctor before doing an all-out test.

Understanding Your Result

The headline is your estimated VO2 max in ml/kg/min.

The method line names the test used.

The METs line expresses the result as multiples of resting oxygen use, where one MET is 3.5 ml/kg/min.

The for comparison line gives typical values for different groups.

When Should You Use This Calculator?

Use it to estimate your aerobic fitness without a laboratory test.

Use it to track the effect of a training programme over months.

Use it to set training zones and race goals.

Common Mistakes

Not going all out on a run test. A comfortable effort underestimates VO2 max.

Testing on a hilly or unmeasured course. Use a track or a measured, flat route.

Taking resting heart rate after activity. Measure it first thing in the morning.

Comparing different tests. Each has its own error, so stick with one.