Running one mile burns roughly 80 to 140 calories for most people, with body weight being the single biggest factor. The old “100 calories per mile” rule of thumb is a reasonable middle estimate for someone weighing around 150 pounds, but it can miss by 30% or more depending on your size.
Calories Burned by Body Weight
Your body has to move its own mass over that mile, so heavier runners burn more energy covering the same distance. At a moderate 10-minute mile pace, here’s what the numbers look like:
- 120 lbs: ~93 calories per mile
- 150 lbs: ~117 calories per mile
- 180 lbs: ~140 calories per mile
- 220 lbs: ~172 calories per mile
A 120-pound runner burns about 11.4 calories per minute while running. A 180-pound runner burns closer to 17 calories per minute. That gap adds up quickly over longer distances, but even for a single mile, it means the heavier runner burns roughly 50% more energy.
Does Running Faster Burn More Per Mile?
This is one of the most common questions runners have, and the answer is a little counterintuitive. At moderate speeds, pace doesn’t change per-mile calorie burn very much. A 150-pound person running a 12-minute mile burns about 119 calories, while the same person running a 9-minute mile burns around 113. The difference is surprisingly small.
The reason: running faster does demand more energy per minute, but you also finish the mile sooner. Those two effects mostly cancel each other out at typical training paces. Dr. Daniel Vigil, a clinical professor at UCLA’s medical school, puts it simply: calorie burn per mile is “a fairly stable number, regardless of how fast you run.”
Where speed does start to matter is at very high intensities. A 150-pound runner sprinting at 8 mph (7.5-minute mile) burns around 166 calories for that mile, a meaningful jump from the 113 at a comfortable jog. At those speeds, your body recruits more muscle fibers, your stride mechanics change, and the metabolic cost per step increases. The Compendium of Physical Activities assigns running at 5 mph a metabolic intensity of 8.3 METs, while running at 8 mph scores 11.8 METs, about 42% higher. But because the faster runner covers the mile in less time, the per-mile difference is smaller than the per-minute difference.
The practical takeaway: if your goal is burning calories, running more miles matters far more than running faster miles.
Running vs. Walking the Same Mile
Running a mile burns about 30% more total energy than walking that same mile, regardless of gender. That’s a consistent finding from exercise physiology research comparing the two activities over 1,600 meters.
The reason is mechanical. When you run, both feet leave the ground with every stride. Your body has to absorb and generate more force at each footstrike, your arms swing harder, and your core works to stabilize a more dynamic movement pattern. Walking is biomechanically more efficient, which is great for endurance but means less energy expenditure per mile. If a 150-pound person burns about 117 calories running a mile, they’d burn roughly 85 to 90 calories walking that same distance at a brisk pace.
Hills and Terrain
Running uphill dramatically increases calorie burn. Research on incline exercise shows that a 5% grade increases energy expenditure by about 52% compared to flat ground. At a 10% incline, you’re burning more than double what you would on a flat surface. Even a modest hill you barely notice visually can add 15 to 20% to the energy cost of that mile.
Trail running and soft surfaces like sand or grass also increase calorie burn because your foot sinks slightly with each step, forcing your muscles to work harder to push off. Wind resistance matters too, though mostly at faster speeds. Running into a strong headwind can raise your effort level noticeably, while a tailwind gives you a small energy discount.
Why Experienced Runners Burn Fewer Calories
Your body gets better at running the more you do it. Trained runners develop what exercise scientists call “running economy,” meaning they use less oxygen and less energy to maintain any given pace. This comes mainly from neuromuscular adaptations: experienced runners bounce less with each stride, wasting less energy on vertical movement. Their tendons store and return elastic energy more effectively, and they’ve eliminated unnecessary arm and torso movements.
This means two people of the same weight running side by side at the same speed won’t necessarily burn the same calories. The newer runner, with less efficient form and more wasted motion, will burn more. Over time, as your running economy improves, you’ll need to run farther or add hills to get the same caloric burn from a single mile. It’s a sign of fitness, not a problem, but it’s worth knowing if you’re using running primarily for weight management.
A Quick Way to Estimate Your Burn
For a reasonable estimate without a calculator, multiply your weight in pounds by 0.75. That gives you a ballpark calorie burn per mile at a comfortable pace. A 160-pound runner gets 120 calories, which lines up well with the research data. It won’t be exact, but it’s closer than the flat “100 calories” estimate for anyone who doesn’t weigh around 130 pounds.
Heart rate monitors and GPS watches use additional data like heart rate, age, and pace to refine the estimate, but they still carry error margins of 10 to 20%. Chest strap monitors tend to be more accurate than wrist-based optical sensors. If you’re tracking calories over weeks and months rather than obsessing over a single run, even a rough estimate is useful enough to spot trends.