What Is the Cooper VO2 Max Test?
The Cooper 12-minute run test is a simple field test of aerobic fitness developed by Dr. Kenneth H. Cooper in 1968 for the US military. You run or walk as far as possible in exactly 12 minutes, and the total distance is used to estimate your VO2 max — the maximum volume of oxygen your body can use per kilogram of body weight per minute (mL/kg/min). A higher VO2 max indicates better cardiovascular endurance.
How to Use This Calculator
Warm up, then run on a flat track or measured course for a full 12 minutes, covering as much ground as you can at a steady, sustainable pace. Record the total distance in meters. Enter that number above and the calculator returns your estimated VO2 max. For best accuracy, perform the test on a 400 m track and have a partner mark your stopping point.
The Formula Explained
The estimate uses the standard Cooper regression equation:
$$\text{VO}_2\text{max} = \dfrac{d - 504.9}{44.73}$$
The constant 504.9 represents a baseline distance offset, while dividing by 44.73 converts the remaining distance into oxygen consumption units. The formula assumes a maximal effort over the full 12 minutes.
Worked Example
Suppose you cover 2,800 meters in 12 minutes. Then $$\text{VO}_2\text{max} = \dfrac{2800 - 504.9}{44.73} = \dfrac{2295.1}{44.73} \approx 51.3 \text{ mL/kg/min}$$ — an excellent score for most adults.
FAQ
Is this accurate? It is an estimate. Lab tests with gas analysis are the gold standard, but the Cooper test correlates well and is widely used for tracking progress.
What is a good VO2 max? Roughly 35–45 mL/kg/min is average for adults; well-trained endurance athletes can exceed 60.
Can I walk? Yes, but a maximal-effort run gives the most representative estimate of aerobic capacity.
