Weight + workload + time
Treadmill Calorie Calculator
Estimate energy use for one treadmill session. Adjust grade to compare like-for-like sessions instead of relying on a generic calories-per-hour table.
Calorie estimate
Calculate your treadmill session
Values stay in your browser and are never sent to us.
Enter your session and choose Calculate to see results.
How it works
Enter body weight, belt speed or pace, incline, and active minutes. The calculator estimates oxygen demand first, then converts that estimate into kilocalories.
Formula
Calories = VO₂ (ml/kg/min) × weight (kg) ÷ 1,000 × 5 × minutes. Select Walking or Running to control the equation. The walking equation is intended for speeds up to 6 km/h; the running equation is intended for speeds at or above 8 km/h. The selected equation stays in use, with a scope warning outside its intended range.
Example
A 70 kg person at 10 km/h for 30 minutes covers 5 km. Adding incline raises the equation's oxygen and calorie estimate while distance stays the same.
FAQ
Why is this different from the treadmill display?
Machines may use different assumptions or sensor inputs. Treat both as estimates, especially if the machine does not know your current weight.
A peer-reviewed comparison of walking equations documents prediction error and underestimation in generalized equations.
Treadmill calories by speed and incline
This chart uses the same ACSM equations as the calculator for a 70 kg (154 lb) person over 30 minutes. Calories scale with body weight and time, so a 35 kg heavier person burns about half again as much, and a 60-minute session doubles each number.
| Session | 0% incline | 5% incline | 10% incline |
|---|---|---|---|
| Walk 4 km/h (2.5 mph) | 107 kcal | 170 kcal | 233 kcal |
| Walk 5 km/h (3.1 mph) | 124 kcal | 203 kcal | 282 kcal |
| Walk 6 km/h (3.7 mph) | 142 kcal | 236 kcal | 331 kcal |
| Run 8 km/h (5.0 mph) | 317 kcal | 380 kcal | 443 kcal |
| Run 10 km/h (6.2 mph) | 387 kcal | 466 kcal | 544 kcal |
| Run 12 km/h (7.5 mph) | 457 kcal | 551 kcal | 646 kcal |
Why incline matters so much
In the walking equation, raising the incline from 0% to 10% at 5 km/h more than doubles the estimate. That is why a brisk 6 km/h walk at 10% incline burns about as much as an 8 km/h run on a flat belt.
If you hold the handrails, you carry less of your own weight up the slope, so the real cost is lower than any equation shows.
Why your treadmill console shows a different number
Many consoles use their own formula and a default body weight unless you enter yours. Some count total calories, including what you would burn at rest, while others count only the extra calories from exercise.
Use one method consistently to compare sessions, rather than mixing numbers from the console, a watch, and this page.