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VO2 Max Calculator

Estimate aerobic capacity from a 12-minute Cooper run or a one-mile Rockport walk. Select the method whose test you completed and enter its measurements.

Cooper 12-minute run

Field-test equations only estimate aerobic capacity. Results can differ from a supervised laboratory measurement and may not fit every person or population. No fitness category or diagnosis is assigned.

The Cooper test is strenuous. Do not attempt a maximal effort if you are unwell, have symptoms, or have been advised to avoid vigorous exercise. Stop if you feel unwell; ask a qualified clinician about personal safety.

Sources: Cooper, JAMA. 1968;203(3):201–204. doi:10.1001/jama.1968.03140030033008. Kline et al., Med Sci Sports Exerc. 1987;19(3):253–259. PMID:3600239.

Your entries stay in this browser tab. They are not uploaded or automatically saved.

How can I estimate VO2 max with a field test?

The Cooper estimate uses distance covered in 12 minutes. The Rockport estimate uses a one-mile fast walk, age, weight, the equation’s male/female coefficient, walk time, and finishing heart rate. Each is a population-based prediction, not a lab measurement.

Frequently asked questions

How can I estimate VO2 max with a field test?

The Cooper estimate uses distance covered in 12 minutes. The Rockport estimate uses a one-mile fast walk, age, weight, the equation’s male/female coefficient, walk time, and finishing heart rate. Each is a population-based prediction, not a lab measurement.

Are my fitness test results uploaded?

No. The estimate is calculated in this browser tab and is not uploaded or automatically saved.

What does the Cooper test estimate use?

It uses the distance covered during a 12-minute run. The estimate is a regression from a field test; it is not a direct oxygen-consumption measurement.

What measurements does the Rockport walk estimate need?

The original equation uses a one-mile walk time, finishing heart rate, age, weight, and a binary sex coefficient. Its source study involved healthy adults ages 30–69; the result should not be treated as a universal prediction.

Is a VO2 max field-test estimate a medical result?

No. It is an approximate fitness estimate and can differ from laboratory testing. It does not diagnose health or determine whether exercise is safe for you.