Calories Burned Walking Calculator

Calories burned walking is the energy your body uses to move you forward over a set time. A heavier body, a faster pace, or a hill all raise it. This calculator is for adults and turns your weight, speed, time, and optional incline into a calorie estimate.

What Calories Burned Walking Measures

The result is your total energy use during the walk, including the energy you would burn at rest anyway. It is not based on steps. It uses how fast you walk, for how long, and how much you weigh. The calculator also shows an "above resting" figure, which removes the resting part.

The Formula

Calories (kcal) = MET x body weight (kg) x time (hours)

A MET is the energy cost of an activity compared with sitting quietly. One MET is about 1 kcal per kg of body weight per hour¹. The MET value for each walking speed comes from the 2024 Adult Compendium of Physical Activities, a catalog of measured energy costs for adults aged 19 to 59¹ ².

How This Calculator Computes Your Result

Enter your weight in kg or lb. Then enter either your speed (as mph, km/h, or a pace per mile or km) or your distance and time. Choose outdoors or treadmill, and add an incline if you want. We convert everything to kg and mph, look up the compendium MET for your speed, and multiply by your weight and time. Between the compendium's speed bands we blend the values, so the result does not jump at the edges. Results are rounded to the nearest whole calorie.

What Your Result Means

Here is what a 70 kg (154 lb) adult burns walking outdoors on level ground, using this calculator's values²:

For most people, a mile of level walking costs about 1.2 to 1.6 kcal per kg of body weight. Multiply by your own weight to see your range.

Why Walking Speed Is Not a Straight Line

Energy use rises faster than speed does. In the compendium's treadmill values, going from 3.0 mph (3.8 METs) to 5.0 mph (8.3 METs) raises speed by about 67 percent but energy use by about 118 percent². Lab work agrees. Ralston found that a curved (hyperbolic) equation fits energy use across normal walking speeds, and that a simpler curve works only for slower speeds up to about 100 m/min (3.7 mph)³. That is why a brisk walk burns much more per minute than a stroll.

The Most Efficient Speed Per Distance

Faster walking burns more per minute, but not always more per mile. In a lab study of 39 adults on a treadmill, the speed people chose on their own was 1.42 m/s (about 3.2 mph). It was also the speed that used the least energy per distance⁴. This calculator shows the same pattern: on level ground, the cost per mile is lowest at about 2.5 to 3.5 mph and rises at slower and faster speeds. At very slow speeds you spend more minutes on each mile, and your body keeps burning its resting energy the whole time.

How Incline Changes the Number

Walking uphill adds a separate cost for lifting your body. The American College of Sports Medicine (ACSM) walking equation adds 1.8 x speed (m/min) x grade to the oxygen cost of walking, and it was built for speeds of 1.9 to 3.7 mph⁵. At 3.1 mph, a 5 percent incline adds about 2.1 METs, so a walk that burns 266 kcal an hour for a 70 kg adult on the flat burns about 416 kcal on a 5 percent incline. Calories per mile and per km use flat distance, so hills raise them.