VO₂ Max Calculator

Estimate aerobic capacity from the distance you cover during a 12-minute Cooper run or walk test.

Warm up first, then cover as much distance as you safely can in exactly 12 minutes.

How the Cooper test estimates VO₂ max

The Cooper test relates distance covered in 12 minutes to maximal oxygen uptake. This calculator applies the commonly used regression equation to the entered distance.

A maximal 12-minute effort is demanding and prediction error varies by population and fitness level. Do not attempt maximal testing when medically contraindicated.

Method and source:Cooper's original 12-minute field-test study

Last reviewed: July 2026

How to use this calculator

Use the calculator as a practical starting point, then apply the result in the context of your training, recovery, and individual response.

  1. 1Enter the requested measurements or performance data.
  2. 2Choose the units and options that match your situation.
  3. 3Calculate, review the method and limitations, and adjust sensibly.

Frequently asked questions

How does this calculator work?

The Cooper test relates distance covered in 12 minutes to maximal oxygen uptake. This calculator applies the commonly used regression equation to the entered distance.

How accurate is this calculator?

A maximal 12-minute effort is demanding and prediction error varies by population and fitness level. Do not attempt maximal testing when medically contraindicated.

Using your results

Every calculated 1RM is an estimate. Use the range as a training guide, and choose working weights that match your experience, technique, and current condition.

Safety tips

  • Warm up thoroughly before attempting heavy lifts.
  • Use controlled movement and proper technique.
  • Use a spotter or safety equipment for near-maximal lifts.
  • Increase the load gradually to reduce injury risk.
  • Stop if you feel pain and allow enough time for recovery.

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