Most people burn between 80 and 140 calories per mile of running, with body weight being the single biggest factor. A 155-pound person running at a moderate 6 mph pace (10-minute miles) burns roughly 360 calories in 30 minutes. A heavier runner burns more, a lighter runner burns less, and speed changes the equation further.
Calories Burned by Weight and Speed
Your body weight determines how much energy it takes to move you forward. A heavier body requires more force with every stride, which means more fuel burned. Speed matters too, because running faster demands more energy per minute. Here’s how the numbers break down for 30 minutes of running, based on data from Harvard Health Publishing:
5 mph (12-minute mile):
- 125 pounds: 240 calories
- 155 pounds: 288 calories
- 185 pounds: 336 calories
6 mph (10-minute mile):
- 125 pounds: 295 calories
- 155 pounds: 360 calories
- 185 pounds: 420 calories
10 mph (6-minute mile):
- 125 pounds: 453 calories
- 155 pounds: 562 calories
- 185 pounds: 671 calories
If your weight falls between these numbers, your calorie burn will too. A rough shorthand: for every additional 10 pounds of body weight, expect to burn about 5 to 10 more calories per mile.
Per Mile vs. Per Minute
There are two useful ways to think about calorie burn while running, and they tell you different things. Per-minute calorie burn increases dramatically with speed. Running a 6-minute mile pace burns nearly twice the calories per minute as a 12-minute mile pace. If your goal is to maximize calorie burn in a limited time window, running faster wins.
Per-mile calorie burn, on the other hand, is more stable. Whether you run a mile in 8 minutes or 12 minutes, you burn roughly the same total calories for that mile. The difference is modest, typically 10 to 20%. This is because covering the same distance requires your muscles to do a similar amount of total work regardless of speed. So if your goal is simply to burn calories over a set distance, like a 3-mile loop, your pace matters less than you might expect.
How the Calorie Math Actually Works
Exercise scientists measure energy cost using a unit called a MET, which stands for metabolic equivalent. One MET is the energy you burn sitting still. Running at 5 mph registers at 8.3 METs, meaning it costs about 8 times more energy than resting. At 6 mph, it’s 9.8 METs. At 7.5 mph, 11.5 METs. At a fast 10 mph, you’re at 14.5 METs.
You can estimate your own calorie burn with a simple formula: multiply the MET value by your weight in kilograms, then multiply by the duration in hours. For example, a 155-pound person (70 kg) running at 6 mph for 30 minutes would calculate as 9.8 × 70 × 0.5 = 343 calories. That lines up closely with the Harvard figures above, and it gives you a way to estimate for any speed or duration.
The Afterburn Effect
Your body doesn’t stop burning extra calories the moment you stop running. After exercise, your metabolism stays elevated while your body restores oxygen levels, clears metabolic byproducts, and repairs muscle tissue. This process, known as excess post-exercise oxygen consumption, adds roughly 6% to 15% on top of the calories you burned during the run itself. If your run burned 400 calories, you might burn an additional 24 to 60 calories in the hours that follow.
Intensity is the main driver. A hard tempo run or interval session produces a noticeably larger afterburn than a slow, easy jog. Steady-state aerobic running at a conversational pace produces the smallest effect. For most recreational runners doing easy to moderate efforts, the afterburn is real but modest, not a reason to overestimate your total burn.
Running vs. Walking the Same Distance
Running burns more calories than walking over the same distance, but the gap isn’t as large as it feels. When you walk a mile, your body moves efficiently, with less vertical bounce and lower muscle activation. Running adds impact forces, greater muscle recruitment, and more cardiovascular demand. The result is that running a mile typically burns about 20% to 30% more calories than walking that same mile.
The afterburn difference widens the gap further. The post-exercise calorie burn after running is more than double what it is after walking, because of the higher intensity. Still, walking remains a perfectly effective way to burn calories if you’re covering enough distance. The advantage of running is primarily one of time efficiency: you burn those calories in fewer minutes.
Interestingly, at speeds around 5 mph (a very fast walk or very slow jog), walking actually becomes less efficient than running. Your body’s biomechanics are optimized for walking at slower speeds and running at faster ones. In that awkward transition zone, you’re better off breaking into a jog.
Hills, Terrain, and Surface
Running uphill increases calorie burn substantially. For every 1% of incline grade, a 150-pound runner burns about 10 additional calories per mile, an increase of roughly 12%. A run on a 5% grade, which feels like a moderate hill, could burn 50 to 60% more calories per mile than the same run on flat ground.
The surface underfoot matters too. Running on loose sand requires up to 33% more energy than running on pavement, because your foot sinks and slides with each push-off. Even packed trails add a small cost. Forest trails increase energy expenditure by about 3% compared to a hard, flat road, and rougher cross-country terrain bumps that up to around 6%. If you run on a beach or technical trail, you’re burning meaningfully more than the standard calorie estimates suggest.
Altitude and Heat
Running at high altitude does increase your metabolic rate slightly. Your body works harder in thinner air, and exposure to lower oxygen levels can raise your resting metabolic rate. However, the extra calorie burn from altitude alone is small. Research suggests that the weight loss people often notice at high elevations is driven more by reduced appetite and nausea than by increased energy expenditure.
Heat has a similar story. Your body burns extra energy to cool itself through sweating and increased blood flow to the skin, but the additional calorie cost is modest for most conditions. Neither altitude nor heat should change your calorie estimates dramatically unless you’re at extreme elevations or in sustained, intense heat.
How Accurate Is Your Watch?
If you rely on a fitness tracker or smartwatch for calorie estimates, treat those numbers with healthy skepticism. Research from Harvard’s School of Engineering found that wrist-based wearables can have error rates of 30% to 80% for calorie estimation. Some overestimate, some underestimate, and accuracy varies between brands, models, and individual users.
Chest-strap heart rate monitors paired with well-calibrated software tend to be more accurate than wrist-based optical sensors, but no consumer device is precise. The weight-and-speed based estimates in this article are likely just as reliable as what your watch tells you, if not more so. If you’re tracking calories for weight management, it’s wise to assume your true burn is somewhere in a range rather than treating any single number as exact.
A Quick Reference for Common Runs
For a 155-pound runner at a moderate 10-minute-mile pace, here’s what typical runs look like in calorie terms:
- 1 mile: approximately 120 calories
- 5K (3.1 miles): approximately 370 calories
- 5 miles: approximately 600 calories
- 10K (6.2 miles): approximately 745 calories
- Half marathon (13.1 miles): approximately 1,570 calories
Scale these up or down by roughly 15% to 20% for every 30 pounds of body weight difference. A 185-pound runner doing a 5K at the same pace burns closer to 430 calories, while a 125-pound runner burns around 300.