Walking for one hour burns roughly 240 to 430 calories for most adults, depending primarily on your body weight and walking speed. A 150-pound person walking at a moderate 3 mph pace will burn around 240 calories, while someone closer to 200 pounds at the same speed burns closer to 336. Speed matters too: picking up the pace from a casual stroll to a brisk walk can increase your calorie burn by 50% or more.
Calorie Burn by Weight and Speed
Your body weight is the single biggest factor in how many calories you burn per hour of walking. Heavier bodies require more energy to move, so a larger person burns more calories covering the same distance at the same speed as a lighter person. Here’s what the numbers look like across common weight ranges and walking speeds:
For people weighing 125 to 174 pounds:
- 2 mph (slow stroll): about 174 calories per hour
- 2.5 mph (casual pace): about 210 calories per hour
- 3 mph (moderate pace): about 240 calories per hour
- 3.5 mph (brisk walk): about 276 calories per hour
- 4 mph (very brisk): about 312 calories per hour
For people weighing 175 to 250 pounds:
- 2 mph: about 240 calories per hour
- 2.5 mph: about 288 calories per hour
- 3 mph: about 336 calories per hour
- 3.5 mph: about 384 calories per hour
- 4 mph: about 432 calories per hour
The jump between the two weight categories is significant. At 3.5 mph, a person in the heavier group burns roughly 40% more calories than someone in the lighter group, even though they’re doing the exact same activity at the exact same speed.
Why Speed Changes Everything
Walking speed doesn’t just change how far you go. It changes how hard your body works with every step. Exercise scientists measure this using a scale called METs (metabolic equivalents), which compares an activity’s energy demand to sitting still. Strolling at under 2 mph registers at just 2.0 METs, meaning you’re only burning twice as much energy as you would sitting on the couch. A moderate walk at about 3 mph jumps to 3.5 METs. A brisk walk at 3.5 mph hits 4.3 METs, more than doubling the intensity of a slow stroll.
The CDC defines brisk walking as anything faster than 3.5 mph. That’s the pace where you’re breathing noticeably harder but can still hold a conversation. It’s also the threshold where walking starts to deliver meaningful cardiovascular benefits beyond just burning calories. If you’re not sure how fast you’re going, a simple test: at 3.5 mph, most people take roughly 100 to 120 steps per minute.
Weight vs. Muscle vs. Height
You’ll sometimes hear that people with more muscle burn significantly more calories during exercise, even at the same weight. For walking specifically, the research tells a more nuanced story. A study published in the Journal of Experimental Biology found that the energy cost of walking is driven more by total body mass and height than by body composition. People of the same height burn essentially the same amount of energy per pound of body weight to walk a given distance, regardless of whether that weight comes from muscle or fat. The difference in energy cost between individuals of different heights was only about 4.4% per stride.
This also means that if you lose weight, your calorie burn per hour of walking will drop proportionally. Researchers confirmed that people who lost weight had the same per-pound metabolic cost of walking as before. Your body simply had less mass to move. That’s not a reason to avoid walking for weight management. It just means the calorie estimates above will shift as your weight changes.
How Terrain and Incline Add Up
Walking on flat ground is the baseline, and any incline adds calories fast. Walking on a 5% grade (a moderate hill or a treadmill set to 5% incline) increases your calorie burn by about 52% compared to flat walking. At a 10% grade, you’re burning more than double what you’d burn on flat ground, an increase of roughly 113%.
To put that in real numbers: if a 160-pound person burns about 250 calories per hour walking on flat ground at 3 mph, that same walk on a 5% incline would burn closer to 380 calories. On a 10% incline, they’d burn around 530 calories per hour. That’s approaching the calorie burn of jogging, without the joint impact.
Uneven terrain like trails, sand, or grass also increases energy expenditure compared to a paved sidewalk, though the effect is harder to quantify because it varies so much. Soft sand, for instance, requires significantly more effort than packed dirt. If you walk the same route every day and want to increase your burn without walking faster or longer, adding hills is the most effective single change you can make.
How to Estimate Your Personal Burn
If you want a quick estimate tailored to your own body, there’s a straightforward formula using METs. Multiply the MET value of your walking speed by your weight in kilograms, then multiply by the number of hours. The result is your approximate calorie burn.
For example, a 170-pound person (77 kg) walking briskly at 3.5 mph (4.3 METs) for one hour: 4.3 × 77 × 1 = 331 calories. That lines up closely with the chart estimates above, which is a good sign the numbers are reliable. To convert your weight to kilograms, divide your weight in pounds by 2.2.
Fitness trackers and smartwatches use a version of this same calculation, often adjusted for your heart rate data if the device has a sensor. They’re generally accurate to within 15 to 20% for steady-state activities like walking, which makes them useful for tracking trends over time even if the exact number on any given day isn’t perfect.
Walking vs. Running for Calorie Burn
Running burns more calories per minute than walking, but the gap narrows when you compare calories per mile rather than per hour. A 155-pound person burns about 240 calories walking 3 miles in an hour at 3 mph. That same person running those 3 miles in 30 minutes burns around 340 calories. The runner burns more total, but only about 40% more for the same distance. The runner also finishes in half the time, which matters if efficiency is the priority.
Where walking holds its own is sustainability. Most people can walk for an hour comfortably every day without significant recovery needs or injury risk. Running an hour daily demands more from your joints and muscles, and many recreational runners can’t sustain that volume. Over a full week, a daily one-hour walker may accumulate similar or even greater total calorie burn than someone who runs three times a week for 30 minutes each session.