How to Calculate Calories Burned Walking or Running
Whether you are walking for weight loss or training for a 10K, knowing how many calories you actually burn is essential for setting realistic nutrition targets. The problem is that most people either guess wildly or trust a wrist tracker that can be off by 20–40%.
This guide explains the MET (Metabolic Equivalent of Task) formula — the same one used by exercise scientists — and walks through real examples for walking and running at various paces. By the end, you will know how to estimate your burn with paper-and-pencil accuracy.
✨Key takeaways
- Calories burned ≈ MET × body weight (kg) × duration (hours).
- Walking at 3.5 mph has a MET of ~4.3; running at 6 mph has a MET of ~9.8.
- Heavier people burn more calories at the same speed and duration.
- Fitness trackers overestimate by 20–40% on average — use MET values as a cross-check.
The MET formula
MET stands for Metabolic Equivalent of Task. A MET of 1.0 equals the energy you burn sitting still (about 1 kcal/kg/hour). A MET of 5.0 means you are burning five times that rate.
The formula: Calories = MET × body weight in kg × duration in hours.
Example: a 75 kg person walking briskly (MET 4.3) for 45 minutes. Calories = 4.3 × 75 × 0.75 = 242 kcal.
MET values for common walking and running paces
Walking, slow pace (2.0 mph): MET 2.8. Walking, moderate (3.0 mph): MET 3.5. Walking, brisk (3.5 mph): MET 4.3. Walking, very brisk (4.0 mph): MET 5.0.
Running, slow jog (4.5 mph): MET 7.0. Running, moderate (5.5 mph): MET 8.8. Running, steady (6.0 mph / 10 min/mile): MET 9.8. Running, fast (7.5 mph / 8 min/mile): MET 11.5. Running, very fast (9.0 mph): MET 14.5.
These values come from the Compendium of Physical Activities, the same reference our Calories Burned Calculator uses.
Worked example: 30-minute run at 6 mph
Runner weighs 68 kg. MET for 6 mph = 9.8. Duration = 0.5 hours.
Calories = 9.8 × 68 × 0.5 = 333 kcal. That is roughly equivalent to a medium bagel with cream cheese.
The same person walking briskly for 30 minutes: 4.3 × 68 × 0.5 = 146 kcal — less than half the burn, which is why running is more time-efficient for calorie expenditure.
Why fitness trackers overestimate
Wrist-based optical heart rate sensors struggle with motion artefacts during exercise. Studies from Stanford and others have shown errors of 20–40% in calorie estimation, almost always too high.
The practical fix: use MET-based estimates as a cross-check. If your watch says you burned 500 kcal on a 30-minute jog but the MET formula says 340, trust the formula and eat accordingly.
How terrain and conditions affect the burn
Incline: walking uphill at a 5% grade increases the MET by roughly 40–60% compared to flat ground. A 3.5 mph walk at 5% grade jumps from MET 4.3 to about MET 6.3.
Wind resistance: running into a strong headwind can increase energy expenditure by 5–10%, but tailwinds do not reduce it by the same amount because of aerodynamic drag.
Surface: soft sand increases the MET by roughly 50% compared to a paved road at the same speed. Trails with uneven footing add 10–20%.
Try the calculators referenced in this guide
Put the maths into practice — every calculator is free and runs entirely in your browser.
Frequently Asked Questions
Is walking or running better for weight loss?
Running burns more calories per minute, but walking is lower-impact and more sustainable for beginners. The best exercise is the one you will actually do consistently. Both create a calorie deficit when paired with appropriate nutrition.
Does body weight really matter that much?
Yes. A 90 kg person burns about 35% more calories than a 65 kg person doing the exact same activity at the same speed and duration, because they are moving more mass.
How do I convert my pace to mph?
Divide 60 by your minutes-per-mile pace. A 10 min/mile pace = 60/10 = 6 mph. A 12 min/mile pace = 60/12 = 5 mph. Then look up the corresponding MET value.
The Precision Calculator Editorial Team
The editorial team at Get Precision Calculator writes practical, formula-driven guides that explain the maths behind every calculator on this site. All content is reviewed for accuracy before publishing.
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