Cooper Test VO2max Calculator
The Cooper test estimates aerobic fitness from a single 12-minute maximal run. You cover as much ground as you can in 12 minutes, and the distance is converted into an estimate of VO2max, the maximum rate at which your body can use oxygen during exercise. This calculator applies the standard Cooper equation to the distance you enter in metres and returns your estimated VO2max in millilitres per kilogram per minute, along with the distance in kilometres and miles for reference. Run on a flat, accurately measured course and pace for an even, sustainable effort. Treat the result as a field estimate for tracking progress over time.
Cooper test VO2max formula
VO2max (ml/kg/min) = (distance in metres - 504.9) / 44.73
distance (km) = metres / 1000
distance (miles) = metres / 1609.344
average pace (min/km) = 12 / (metres / 1000)
Worked example: 2,800 metres in 12 minutes gives VO2max = (2,800 - 504.9) / 44.73 = 51.31 ml/kg/min, a distance of 2.80 km or 1.74 miles, at an average pace of 4.29 min/km.
Cooper test notes
- The test is a maximal 12-minute run; distance covered drives the estimate.
- Run on a flat, measured course for a valid distance.
- VO2max norms depend on age and sex; compare against appropriate norms.
- Field estimates differ from laboratory measurement; use it to track trends.
- Warm up first and pace for an even, sustainable maximal effort.
Cooper test: frequently asked questions
What is the Cooper test?
The Cooper test, developed by Dr Kenneth Cooper, measures the distance a person can run or walk in 12 minutes. The distance covered is used to estimate maximal oxygen uptake (VO2max), a marker of aerobic fitness. The further you go in 12 minutes, the higher the estimated VO2max.
What is the Cooper VO2max formula?
The standard Cooper equation is VO2max in millilitres per kilogram per minute equals (distance in metres minus 504.9) divided by 44.73. Enter the distance covered in 12 minutes in metres and the calculator applies this formula.
How do I run the Cooper test?
After a warm-up, run as far as you can on a flat measured course or track for exactly 12 minutes, pacing for an even, sustainable maximal effort. Record the total distance covered in metres and enter it into the calculator.
How accurate is the Cooper estimate?
It is a field estimate. The Cooper equation predicts VO2max from running distance and reflects group averages, so an individual's laboratory-measured VO2max can differ. Pacing, terrain, weather, and motivation all affect the result. Use it to track change over time rather than as an exact physiological measurement.
What is a good VO2max?
VO2max norms vary by age and sex, with trained endurance athletes reaching much higher values than the general population. This calculator returns your estimate in millilitres per kilogram per minute; compare it against published age and sex norms or your own previous tests.
Official sources
- National Center for Biotechnology Information (PubMed): Cooper test and VO2max estimation literature.
- U.S. Centers for Disease Control and Prevention: Physical activity basics.
Reviewed by the CalculatorHub team, edited by James Graham, 17 June 2026. See our methodology.