This Bruce protocol calculator estimates VO2 max — your aerobic fitness — from how long you last on the standard Bruce treadmill test. Enter your time and sex above.
Formula (men)
VO2 max = 14.8 − 1.379×T + 0.451×T² − 0.012×T³
- T — total time on the test, in minutes
Example
10 minutes (men): VO2 max ≈ 34.1 mL/kg/min.
The Bruce test raises treadmill speed and incline every 3 minutes; do it under supervision.
Important
This tool is for general educational purposes only and is not medical advice, diagnosis, or treatment. It does not replace evaluation by a qualified healthcare professional — consult one for any health decision. Last updated: August 2026.
Frequently Asked Questions
What is the Bruce protocol?
A graded treadmill test that raises speed and incline every 3 minutes to gauge aerobic fitness and estimate VO2 max.
How do I estimate VO2 max from it?
Plug your total test time into the Bruce formula for your sex; longer time means higher VO2 max.
Is the Bruce test safe to do alone?
It is a maximal test and should be done under professional supervision, especially if you have any heart risk.