How many calories does running burn?
The simplest rule of thumb is about 1 calorie per kilogram of body weight per kilometre. A 70 kg runner burns roughly 70 calories per km — around 350 for a 5K and 700 for a 10K. It is a good back-of-envelope estimate, but it ignores pace and incline.
This calculator uses the ACSM running equation, the same metabolic formula used in exercise physiology. It estimates your oxygen cost from your speed and grade, then converts it to calories using your body weight and how long you ran.
What actually drives calories burned
- Body weight — the single biggest factor. Moving a heavier body the same distance costs more energy, which is why the calorie total scales almost directly with weight.
- Distance — total calories are roughly proportional to how far you run. Distance matters far more than speed.
- Incline — running uphill adds vertical work. A steady grade noticeably increases the burn at the same speed.
- Pace — a smaller factor than most people assume. Running the same distance faster burns a little more, but the difference is modest.
Calories burned running by weight
Approximate calories burned for a 5K and a 10K at an easy pace, by body weight. These are the values this calculator produces at a 6:00/km (about 9:39/mile) pace on flat ground.
| Body weight | 5K (calories) | 10K (calories) |
|---|---|---|
| 50 kg (110 lb) | 276 | 553 |
| 60 kg (132 lb) | 332 | 663 |
| 70 kg (154 lb) | 387 | 774 |
| 80 kg (176 lb) | 442 | 884 |
| 90 kg (198 lb) | 497 | 995 |
Gross vs net calories
This tool reports gross calories — the total your body uses during the run, including the calories you would have burned at rest anyway. Net calories (the extra above resting) are a little lower, usually by around 1 calorie per kg per hour. For weight-management maths, net is more precise, but gross is what most fitness trackers and calculators display.
Either way, treat the number as a good estimate, not a precise measurement. Running economy, fitness, temperature, and terrain all shift real energy cost.
Running for a goal, not just calories?
The Running Genie turns your runs into a structured plan — so every session moves you towards a race time or a habit, not just a number on a tracker.
Frequently asked questions
How many calories do you burn running?
A useful rule of thumb is about 1 calorie per kilogram of body weight per kilometre. A 70 kg runner burns roughly 70 calories per km — about 350 for a 5K and 700 for a 10K. This calculator refines that using the ACSM equation, which also accounts for pace and incline.
Does running faster burn more calories?
For a fixed distance, running faster burns slightly more per minute but takes less time, so the total is only modestly higher. The biggest drivers of calories burned are body weight and total distance, not how fast you run it.
How many calories does running a 5K burn?
At an easy pace, a 5K burns roughly 275 calories for a 50 kg runner, about 390 for a 70 kg runner, and around 500 for a 90 kg runner. Body weight is the main variable, which is why heavier runners burn more for the same distance.
Does incline change how many calories I burn?
Yes. Running uphill raises the energy cost, so you burn more at the same speed. This calculator lets you add an incline percentage and applies the ACSM vertical-work term to account for it.
Is this gross or net calories?
It reports gross energy expenditure — the total your body uses during the run, including what you would have burned at rest. Net calories (the extra above resting) are a little lower, typically by around 1 calorie per kg per hour.
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