Calculator
Example Data Table
| Weight | Duration | Distance | Incline | Terrain | Approx. Gross Calories |
|---|---|---|---|---|---|
| 68 kg | 30 min | 2.5 km | 0% | Pavement | 110–140 kcal |
| 82 kg | 45 min | 4.0 km | 4% | Trail | 260–320 kcal |
| 70 kg | 60 min | 5.2 km | 1% | Treadmill | 240–300 kcal |
| 95 kg | 35 min | 3.0 km | 0% | Sand | 230–290 kcal |
Formula Used
1) Speed conversion
Speed in m/min = speed in km/h × 1000 ÷ 60
2) Walking oxygen cost
VO₂ = 0.1 × speed + 1.8 × speed × grade + 3.5
3) Base MET
Base MET = VO₂ ÷ 3.5
4) Adjusted MET
Adjusted MET = Base MET × terrain factor × load factor
5) Gross calories
Calories = MET × 3.5 × body weight (kg) ÷ 200 × duration (min)
Net calories remove resting energy by using (MET − 1) instead of full MET. Distance can be entered directly or derived from steps × stride length.
How to Use This Calculator
- Enter body weight and walking duration.
- Add distance or speed. You can also use steps with stride length.
- Set incline, terrain, and any carried load for a more detailed estimate.
- Optionally enter a calorie goal to estimate required minutes.
- Click the calculate button to show results above the form.
- Review gross calories, net calories, pace, cadence, and charted projections.
- Use the CSV button to export metrics as a spreadsheet-friendly file.
- Use the PDF button to save a printable result summary.
Frequently Asked Questions
1) What affects the calorie estimate most?
Body weight, duration, walking speed, incline, terrain, and carried load matter most. Faster pace and steeper grade increase MET, which raises estimated calorie burn.
2) What is the difference between gross and net calories?
Gross calories include total energy used during the session. Net calories remove the energy your body would have used at rest during the same time period.
3) Can I calculate with steps only?
Yes. Add steps and stride length, plus duration. The calculator can derive distance, estimate speed from time, and then compute calorie burn.
4) Why does the result change when I enter distance and speed together?
When distance and duration are available, the calculator derives average speed from them. That keeps the session internally consistent and avoids conflicting inputs.
5) Does incline make a large difference?
Usually yes. Even moderate uphill walking can raise oxygen demand noticeably. That increases MET and often lifts total calories well above flat-ground walking.
6) Why is terrain included?
Soft or uneven surfaces often require more stabilizing effort than smooth pavement. The terrain factor helps reflect that extra energy demand in the estimate.
7) Can treadmill and outdoor results differ?
Yes. Wind resistance, surface firmness, and natural route changes can shift real effort outdoors. Treadmill walking is often steadier and slightly easier to standardize.
8) Is this suitable for medical decisions?
No. This tool gives an exercise estimate, not a medical diagnosis. Use it for planning and comparison, and consult a qualified professional for health guidance.