VO2 Max Calculator (Cooper Test)

What Is the Cooper Test?

The Cooper test, developed by Dr. Kenneth Cooper in 1968, estimates aerobic fitness from a single, simple measurement: how far you can run in exactly 12 minutes. It remains widely used by coaches, the military, and fitness programs because it needs no equipment beyond a stopwatch and a measured track or course, while still correlating well with lab-measured VO2 max — your body's maximum rate of oxygen consumption during intense exercise, and one of the best available single indicators of cardiovascular fitness.

How to Use This Calculator

Run as far as you can at a hard, sustained pace for exactly 12 minutes, then enter the total distance you covered. For an accurate result, pace yourself so you're near exhaustion at the 12-minute mark rather than sprinting early and fading, or holding back and finishing with plenty left.

How We Calculate It

VO2 max (ml/kg/min) = (distance in meters − 504.9) ÷ 44.73. This is Cooper's original regression formula, derived from comparing 12-minute run distances against lab-measured oxygen consumption in his original research.

A Few Notes

Field tests like this trade some precision for convenience — a lab test with breath-by-breath gas analysis remains the gold standard, and your result here can shift with pacing strategy, running surface, weather, and motivation on the day. Treat it as a useful way to track your own trend over time rather than a clinically precise measurement, and build up to a maximal effort test gradually if you're not already used to hard, sustained running.