SuCalc
Health & Fitness

VO₂ Max Estimate Calculator

Updated Aug 26, 2026 Reviewed Aug 26, 2026
Estimate aerobic capacity with a Cooper 12-minute run, Rockport one-mile walk, or maximum-to-resting heart-rate ratio.

Aerobic-capacity field estimate

Choose one test and enter measured data

Estimation method

Used to report approximate absolute oxygen consumption; also required by Rockport.

Use a measured flat course and the total distance after exactly 12 minutes.

Field estimate — exercise safely
The run test is maximal and the walk test is brisk. Do not perform a test when strenuous exercise is unsafe; this tool does not replace lab testing or medical advice.

Result

Calculation summary

Enter values to see the result

Your result, breakdown, assumptions, and warnings will appear here.

Oxygen-capacity preview

One method, one transparent estimate

Live preview
One method, one transparent estimateA lungs and pulse graphic with live VO2 max, metabolic equivalent, and selected test method.VO₂ max42.4 ml/kg/minEquivalent capacity12.1 METSelected methodCooper
Repeat the same protocol under similar conditions when tracking change.
FormulaVO₂ max = (12-minute distance in m − 504.9) ÷ 44.73

How to use this calculator

  1. 1Choose the test matching data you measured.
  2. 2Enter the requested body, distance, time, and heart-rate values.
  3. 3Treat the output as a field estimate and repeat the same protocol for tracking.

Formula

Cooper: VO₂ max = (distance in m − 504.9) ÷ 44.73

Alternative methods use the published Rockport regression or 15.3 × maximum heart rate ÷ resting heart rate.

Calculation steps

  • Normalize weight, distance, time, and heart-rate inputs.
  • Apply only the selected field-test equation.
  • Convert the relative estimate to METs and approximate absolute oxygen consumption.

Worked example

Covering 2,400 m in 12 minutes estimates about 42.4 ml/kg/min, or 12.1 MET.

Assumptions

  • Cooper requires a maximal 12-minute effort on a measured course.
  • Rockport requires a one-mile brisk walk and immediate heart rate.
  • The heart-rate ratio is a rough shortcut and measured maximum is preferable.
  • Laboratory gas analysis is the reference method.

Sources

Frequently asked questions

Which method should I choose?

Use Cooper for an appropriate maximal run, Rockport for a brisk walk, and heart-rate ratio only with reliable heart-rate data.

Is this a medical test?

No. It applies field equations and does not determine exercise safety.

Why can a lab result differ?

Field equations include population error; lab testing measures respiratory gases directly.

Can I compare different methods?

Use caution; repeat the same protocol under similar conditions for tracking.

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