Walking a mile burns roughly 80 to 100 calories for most people. The exact number depends primarily on your body weight, with walking speed and terrain playing secondary roles. A 120-pound person burns about 64 calories per mile at a normal pace, while a 250-pound person burns about 133 calories covering the same distance.
Calories Burned Per Mile by Body Weight
Your body weight is the single biggest factor in how many calories you burn walking a mile. Heavier bodies require more energy to move, so the relationship is nearly linear. At a typical walking pace of 2.5 to 3.5 mph on flat ground:
- 120 pounds: ~64 calories per mile
- 180 pounds: ~96 calories per mile
- 200 pounds: ~106 calories per mile
- 250 pounds: ~133 calories per mile
A simple rule of thumb: multiply your weight in pounds by 0.53 to estimate your per-mile calorie burn at a comfortable pace. This won’t be perfect, but it gets you within a few calories for flat-ground walking.
How Speed Changes the Numbers
Walking faster does burn more calories per mile, but the effect is smaller than most people expect. The big jump happens when you push past a brisk walk into race-walking territory. At 4.0 mph (a brisk, purposeful pace), the numbers climb modestly:
- 120 pounds: ~68 calories per mile
- 180 pounds: ~102 calories per mile
- 200 pounds: ~114 calories per mile
- 250 pounds: ~142 calories per mile
Push to 4.5 mph, which is a very fast walk that most people find awkward to sustain, and the calorie cost jumps more noticeably. A 200-pound person goes from 114 calories at a brisk pace to 146 calories at 4.5 mph. That’s because at very high walking speeds, your body’s biomechanics become less efficient. Your legs work harder to maintain a walking gait than they would if you simply broke into a jog.
There’s actually a crossover point around 5 mph (8 km/h) where walking becomes more energy-intensive than running the same speed. Above that threshold, your body is fighting its own mechanics to stay in a walking stride, and jogging would actually be more efficient per calorie spent.
One counterintuitive finding from researchers at Ohio State University: varying your speed during a walk burns more calories than maintaining a steady pace. The act of speeding up and slowing down costs extra energy that standard calorie calculators don’t account for. This “stop and go” effect could represent up to 8% of the energy you use during everyday walking.
Walking Uphill and on Soft Surfaces
Terrain has a dramatic effect on calorie burn, often more than speed does. For every 1% of uphill grade, a 150-pound person burns roughly 10 extra calories per mile, which works out to about a 12% increase per percent of grade. A moderate hill of 5% grade can add 50 or more calories to a single mile. If you’re walking on a treadmill, even a small incline of 2 to 3% makes a meaningful difference over a few miles.
Surface matters too. Walking on soft sand requires about 1.8 times the energy of walking on pavement at the same speed. That means a mile on a sandy beach could burn 60% to 100% more calories than the same mile on a sidewalk. Trail walking on uneven ground falls somewhere in between, since your stabilizing muscles work harder to manage roots, rocks, and shifting footing.
Gross Calories vs. Net Calories
Most calorie estimates you see online, including the numbers above, are “gross” calories. They include everything your body burns during the walk, including what you would have burned anyway just sitting on the couch. Your body uses roughly 1 to 1.5 calories per minute at rest, depending on your size. Over a 20-minute mile, that’s 20 to 30 calories you would have burned regardless.
If you’re tracking calories for weight loss, the “net” number is what actually matters. To calculate it, subtract those resting calories from your walking total. A 180-pound person burning 96 gross calories per mile has a net burn closer to 70 to 75 calories. That’s still the real energy deficit your walk created, and it’s the number that translates to actual fat loss over time.
Walking a Mile vs. Running a Mile
Running a mile generally burns more calories than walking a mile, despite covering the same distance. This is because running involves a flight phase where both feet leave the ground, and your muscles absorb more impact force with each stride. At normal walking speeds (around 3 mph), running the same mile burns roughly 30 to 40% more energy.
The gap narrows as walking speed increases. And at very high walking speeds above 5 mph, walking actually costs more energy than running. But for the vast majority of people comparing a comfortable walk to an easy jog, running wins on per-mile calorie burn. Walking’s advantage is that it’s easier to sustain, gentler on joints, and more accessible, which often means people walk more total miles over time.
A Quick Way to Estimate Your Burn
You can get a reasonably accurate estimate using MET values, which represent how hard an activity works your body compared to sitting still. Walking at 3.0 mph has a MET value of 3.5, meaning it burns 3.5 times more energy than resting. A brisk 4.0 mph walk is 5.0 METs. The formula is straightforward: multiply 0.0175 by the MET value by your weight in kilograms. That gives you calories per minute, which you can multiply by however long your mile takes.
For a 180-pound person (about 82 kg) walking a mile in 20 minutes at 3.0 mph: 0.0175 × 3.5 × 82 = roughly 5 calories per minute, or about 100 calories for the mile. This lines up closely with the chart-based estimates above and works for any body weight.