Treadmill Test Calculator
Convert your Bruce or Modified Bruce treadmill time into estimated VO₂max, METs and the stage you reached.
Test details
years
min
sec
bpm
Estimated VO₂max
--ml/kg/min
--
Aerobic capacity--
Stage reached--
Final speed / grade--
Percent of age-predicted max HR--
Bruce protocol stages
| Stage | Minutes | Speed | Grade | METs |
|---|---|---|---|---|
| 1 | 0–3 | 2.7 km/h | 10% | 4.6 |
| 2 | 3–6 | 4.0 km/h | 12% | 7.0 |
| 3 | 6–9 | 5.5 km/h | 14% | 10.2 |
| 4 | 9–12 | 6.8 km/h | 16% | 13.5 |
| 5 | 12–15 | 8.0 km/h | 18% | 17.0 |
| 6 | 15–18 | 8.9 km/h | 20% | 20.0 |
| 7 | 18–21 | 9.7 km/h | 22% | 23.0 |
…
VO₂max norms (ml/kg/min)
| Age | Poor | Fair | Good | Excellent | Superior |
|---|---|---|---|---|---|
| Men | |||||
| 20–29 | 33 | 37 | 42 | 46 | 53+ |
| 30–39 | 31 | 35 | 41 | 45 | 50+ |
| 40–49 | 30 | 33 | 39 | 43 | 48+ |
| 50–59 | 26 | 31 | 36 | 41 | 46+ |
| 60+ | 20 | 26 | 32 | 36 | 45+ |
| Women | |||||
| 20–29 | 24 | 29 | 33 | 37 | 42+ |
| 30–39 | 20 | 23 | 27 | 32 | 37+ |
| 40–49 | 17 | 20 | 25 | 29 | 33+ |
| 50–59 | 16 | 19 | 22 | 25 | 30+ |
| 60+ | 15 | 18 | 21 | 24 | 28+ |
Values are the lower limit of each band.
How the Bruce treadmill test works
Men: VO₂max = 14.76 − (1.379 × T) + (0.451 × T²) − (0.012 × T³)
Women: VO₂max = 4.38 × T − 3.9
T = total time in minutes
Women: VO₂max = 4.38 × T − 3.9
T = total time in minutes
…
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…
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