VO₂ Max Calculator (Cooper Test)

Estimate aerobic fitness from how far you run in 12 minutes (Cooper test).

How the Math Works

The VO² Max Calculator uses the Cooper Test formula to estimate your maximal oxygen uptake, a key indicator of cardiovascular fitness. The calculation takes the total distance you run in 12 minutes (in meters) and applies this simple linear formula: VO²max = (distance – 504.9) ÷ 44.73. For example, if you cover 2500 meters, your estimated VO²max would be (2500 – 504.9) ÷ 44.73 = 44.6 mL/kg/min. This formula was derived from regression analysis of athletic testing data and provides a quick, equipment-free assessment of aerobic capacity.

Practical Applications

To use this calculator, find a safe, flat track or field and run continuously for exactly 12 minutes as far as possible. Record your total distance in meters — most running tracks are 400 meters per lap, making measurement straightforward. After your run, plug the distance into the formula or use the calculator tool to get your VO²max estimate. For most accurate results, perform the test when well-rested and hydrated, avoid heavy meals beforehand, and warm up thoroughly. Track your results over time to monitor fitness improvements from training.

Day-to-Day Use

Knowing your VO²max helps you understand your aerobic fitness level and set realistic training goals. A higher value generally indicates better endurance capacity, which benefits everything from daily activities like climbing stairs to recreational sports and weight management. Use your results to tailor workouts — those with lower VO²max values might focus on building a base through easy runs, while athletes can use it to gauge training effectiveness and recovery needs. This measurement also helps prevent overexertion during activities by giving you a baseline for how hard you should be working.

Worked example

2,400 m → 42.4 ml/kg/min.

FAQ