SPEED + INCLINE
Enter your treadmill speed and incline to estimate walking or running calories. Compare your session with a flat treadmill at the same speed and see both total energy and calories above rest.
See your estimated total calories and the portion above rest, plus a comparison with a flat treadmill.
Enter your session and choose “Estimate calories”.
30 minutes walking at 5 km/h (3.11 mph), using the ACSM walking equation. Values are gross kcal and assume steady walking without handrail support. These are comparisons, not recommended workout settings.
| Incline | 60 kg | 80 kg | 100 kg |
|---|---|---|---|
| 0% | 107 | 142 | 178 |
| 3% | 147 | 196 | 245 |
| 5% | 174 | 232 | 290 |
| 10% | 242 | 322 | 403 |
| 15% | 309 | 412 | 515 |
Examples for 80 kg and 30 minutes. Walking and running use different equations: choose the way you actually move, not whichever gives the bigger calorie number.
| Session | Speed | Incline | Gross kcal | Above rest kcal |
|---|---|---|---|---|
| Flat walk | 5 km/h | 0% | 142 | 100 |
| Incline walk | 5 km/h | 5% | 232 | 190 |
| Flat run | 9.7 km/h | 0% | 430 | 388 |
Choose walking or running, then enter your bodyweight, belt speed, percent incline and minutes. The unit controls convert the existing values between kg/lb and km/h/mph. The result compares your chosen incline with 0% at the same speed, mode, bodyweight and duration. Use separate calculations for steady segments of an interval workout rather than averaging very different settings.
Speed is converted to meters per minute; incline is divided by 100, so 5% becomes 0.05. The walking equation estimates oxygen cost as 0.1 × speed + 1.8 × speed × grade + 3.5. Running uses 0.2 × speed + 0.9 × speed × grade + 3.5. Multiply oxygen cost by kg, divide by 1000, then multiply by approximately 5 kcal per liter and by minutes. This estimates exercise oxygen demand, not your VO₂ max.
At 5 km/h, speed is 83.33 meters per minute. The walking equation gives approximately 19.33 mL/kg/min. Over 30 minutes at 80 kg, that is 232 gross kcal. The standard resting baseline contributes 42 kcal, leaving 190 kcal above rest. The same flat walk is approximately 142 gross kcal, so the modeled incline difference is 90 kcal.
These equations assume steady movement. The usual walking speed range is about 3.2–5.6 km/h (2–3.5 mph), while the running equation is generally used above about 8 km/h (5 mph). The calculator flags speeds outside those ranges. Very steep settings, sprint intervals, gait changes and supporting bodyweight on handrails can make the prediction less representative. Supported input limits are not a claim that every combination has been validated.
A 5% grade means 5 units of rise per 100 units of horizontal distance; it is not 5 degrees. Enter the percent displayed by your treadmill. If the machine only shows levels, check its documentation for the grade. Declines are outside this tool’s supported range, and a treadmill model should not be treated as a direct prediction for outdoor terrain or wind.
Both equations predict greater oxygen demand as positive grade increases. The calculator shows the difference from a flat treadmill with all other inputs held constant. Handrail support and changes in gait can change the real energy cost.
Enter walking, 3 mph, 12% incline and 30 minutes, then add your bodyweight. Make sure the speed unit is mph: 3 km/h is different. The result is an equation-based estimate at a steep incline, not a recommendation or a guarantee of expenditure.
The calculator assumes you are not supporting your bodyweight on the rails. Leaning or holding yourself up changes the workload, so the result may overestimate your expenditure. No universal handrail correction is applied.
Devices may use different weight assumptions, equations, heart-rate estimates or definitions of active calories. Compare gross with gross and above-rest with above-rest. Agreement between displays does not establish measurement accuracy.
Both are shown. The headline is total energy during the session. The above-rest estimate subtracts the standard resting oxygen cost of 3.5 mL/kg/min for the same duration, which may differ from your personal baseline.
No. This version accepts 0–15% positive incline. Do not enter a negative grade or substitute a treadmill level for a percent; downhill movement needs a different model.
Reference tables use the same calculations and benchmark values as the interactive tool.