Cooper Test VO2 Max CalculatorFree online fitness & health calculator — instant results, no sign-up
Estimate aerobic capacity from distance covered during a 12-minute run.
For general information only. This is not medical advice, diagnosis, dosing guidance or a treatment recommendation. Talk to a doctor or other qualified health professional about your health, pregnancy, or diet.
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About the Cooper Test VO2 Max Calculator
The Cooper Test VO2 Max Calculator estimates aerobic capacity from the distance you cover during a 12-minute run. It uses the Cooper test equation to convert distance in meters into an estimated VO2 max in mL/kg/min. With the default distance of 2400 m, the estimate is 42.37 mL/kg/min.
- Distance in 12 minutes (m)
- Enter the total distance you covered during the full 12-minute run, measured in meters; the default is 2400 m.
Formula and method
V = (d − 504.9) / 44.73
- VEstimated VO2 max in milliliters of oxygen per kilogram of body mass per minute (mL/kg/min).
- dDistance covered in 12 minutes, in meters.
Subtract 504.9 from the distance in meters, divide the result by 44.73, and round the estimate to two decimal places. For the default input, V = (2400 − 504.9) / 44.73 = 42.37 mL/kg/min. The accompanying note is: Approximation; individual results vary.
Worked example
These are the calculator's starting values and the results it actually produces for them.
Inputs
- Distance in 12 minutes2400 m
Results
- Estimated VO2 max42.37 mL/kg/min
- NoteApproximation; individual results vary.
How to use the Cooper Test VO2 Max Calculator
- 1Choose a flat, accurately measured course or track and a way to time exactly 12 minutes.
- 2Warm up, then cover as much distance as you safely can during the 12-minute test, aiming for a sustainable pace.
- 3Record the total distance at the end of 12 minutes, including any partial lap, in meters.
- 4Enter that distance into the calculator; leave 2400 entered to reproduce the default example.
- 5Read the estimated VO2 max alongside the approximation note, rather than treating the estimate as a laboratory measurement.
Reading your result
The Estimated VO2 max row reports predicted maximal oxygen uptake relative to body mass: 42.37 mL/kg/min for 2400 m. Higher estimates generally indicate greater aerobic capacity, but this output does not assign an age- or sex-specific fitness category. The Note row states “Approximation; individual results vary.” to emphasize that actual measured VO2 max may differ.
Limitations
The equation assumes a properly timed, near-maximal 12-minute running effort and an accurately measured distance. Pacing, motivation, running economy, terrain, weather, altitude, fatigue, and measurement error can affect the result. It does not directly measure oxygen uptake or account for age, sex, or medical conditions, and it is not a diagnosis or medical clearance. Very short distances can produce implausible or negative estimates that should not be interpreted as physiological VO2 max. This is a strenuous test; seek medical guidance beforehand if you have health concerns, and stop if you develop chest pain, dizziness, or unusual breathlessness.
Common questions
Why does a distance of 2400 m give 42.37 mL/kg/min?+
The calculator applies the Cooper equation: (2400 − 504.9) / 44.73. Rounding the result to two decimal places gives 42.37 mL/kg/min.
Can I enter a distance recorded over a different duration?+
No. This equation requires the distance covered in exactly 12 minutes. Scaling a shorter or longer run to 12 minutes is not equivalent because the pace you can sustain changes with duration.
Can I use a walking or cycling distance?+
Cycling distance is not suitable for this running-based equation. Walking or taking walking breaks may be necessary for safety, but the resulting estimate is less reliable as an indicator of VO2 max because the test assumes a near-maximal running effort.
Why does the calculator not ask for my weight?+
The Cooper equation predicts relative VO2 max directly from 12-minute distance, so it does not require a separate body-weight input even though the output is expressed per kilogram.
Does the calculator save my information?+
Calculations run in your browser. While signed in, inputs and results are automatically recorded in account history; saving a result creates a separate saved record.
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Results are estimates for informational purposes and are not financial, medical or legal advice.