Walking 1.5 miles burns roughly 100 to 200 calories for most people, with body weight being the single biggest factor. A 180-pound person burns about 150 calories over that distance, while a 120-pound person burns closer to 100. The walk itself takes most people between 23 and 36 minutes depending on pace.
Calories Burned by Body Weight
Your body weight determines most of the calorie cost of walking because heavier bodies require more energy to move the same distance. A useful rule of thumb: a 180-pound person burns about 100 calories per mile, and a 120-pound person burns about 65 calories per mile. Multiply those per-mile numbers by 1.5 and you get a solid estimate.
Here’s what that looks like across a range of body weights for a 1.5-mile walk on flat ground at a moderate pace:
- 120 lbs: ~98 calories
- 150 lbs: ~120 calories
- 180 lbs: ~150 calories
- 200 lbs: ~165 calories
- 250 lbs: ~210 calories
These are estimates based on the relationship between body weight and energy cost per mile. Your actual number will shift somewhat based on pace, terrain, and individual metabolism, but weight and distance account for the lion’s share of the calculation.
How Walking Speed Changes the Numbers
Faster walking does burn more calories per mile, though the effect is smaller than most people expect. Exercise scientists use a unit called a MET (metabolic equivalent) to measure how hard an activity works your body compared to sitting still. Walking at different speeds on flat ground produces distinctly different MET values:
- 2.5 mph (leisurely): 3.0 METs
- 3.0 mph (moderate): 3.8 METs
- 3.5 mph (brisk): 4.8 METs
- 4.0 mph (very brisk): 5.5 METs
That means a very brisk walk works your body nearly twice as hard as a leisurely stroll. In practical terms, picking up your pace from a casual 2.5 mph to a brisk 3.5 mph could add 30 to 50 extra calories to your 1.5-mile total, depending on your weight. The trade-off is that a brisk pace covers 1.5 miles in about 26 minutes, while a leisurely pace takes closer to 36 minutes. You burn more per minute at a faster pace, but you also finish sooner, so the total difference over the same distance is moderate rather than dramatic.
Hills and Terrain Make a Real Difference
If your 1.5-mile route includes hills, your calorie burn goes up meaningfully. Research based on the American College of Sports Medicine’s metabolic equations shows that for every 1% of uphill grade, a 150-pound person burns about 10 more calories per mile. That’s roughly a 12% increase per percentage point of grade.
So if you’re walking a route with an average 5% incline, you could be burning 50 to 60 extra calories per mile compared to flat ground. Over 1.5 miles, that adds up. A 150-pound person who would normally burn about 120 calories on a flat 1.5-mile walk might burn 195 or more on a hilly route. Walking on sand, grass, or gravel also increases the energy cost compared to pavement, though not as dramatically as a sustained incline.
Walking 1.5 Miles vs. Running 1.5 Miles
Running the same 1.5 miles burns roughly double the calories of walking it. A 180-pound person who burns about 150 calories walking 1.5 miles would burn closer to 300 calories running the same distance. This happens because running involves a flight phase where both feet leave the ground, requiring significantly more muscular effort and energy to propel and then absorb the impact of your body weight with each stride.
That said, the comparison matters most if you’re choosing between the two. If running isn’t realistic for you right now, walking 1.5 miles still represents a genuine energy expenditure, and it’s something you can do daily without the joint stress and recovery demands that come with running.
Putting the Calorie Burn in Context
Burning 100 to 200 calories might not sound like much in isolation, but consistency is what makes walking effective. Walking 1.5 miles every day at a moderate pace adds up to roughly 700 to 1,400 calories per week, depending on your weight. Over a month, that’s 3,000 to 6,000 calories, or roughly one to two pounds of fat if your diet stays the same. That aligns with the kind of gradual, sustainable weight loss that tends to stick.
Keep in mind that fitness trackers and treadmill displays often overestimate calorie burn by 15 to 30%. If you’re using a walking routine to manage your weight, the estimates in this article are closer to reality than what your wrist might tell you. For the most accurate personal number, your weight is the variable that matters most. The simple formula of roughly 55 calories per mile per 100 pounds of body weight gets you within a reasonable range for flat-ground walking at a moderate pace.