Calories Burned Running Calculator

Calories burned running is the energy your body uses during a run, measured in kilocalories (kcal). It depends on your body weight, how long you run and how fast you go. This calculator is for adults 18 and over.

What Running Calories Measure

The result is the total energy you use while running, including the small amount you would burn anyway just by being alive. It does not measure fat loss directly. It is an estimate for an average runner of your weight, not a lab reading of your own body.

The Formula

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

A MET is a multiple of resting energy use, set at about 1 kcal per kg of body weight per hour¹. MET values for running at each speed come from the 2024 Adult Compendium of Physical Activities².

How This Calculator Computes Your Result

Enter your weight, then either distance and time, or time and speed or pace. The calculator turns these into speed, picks the running MET for that speed, and fills in values between the compendium's listed speeds. It shows total calories, calories per mile and calories per km, rounded to whole numbers. It works for speeds from 4.0 to 14.0 mph (6.4 to 22.5 km/h). It also shows the net figure, which leaves out the resting calories you would have burned anyway.

What Your Result Means

Running MET values rise with speed²:

For a 70 kg (154 lb) runner, 10 km in 60 minutes is about 661 kcal. That is about 106 kcal per mile and 66 kcal per km. The same runner at 60 kg would burn about 566 kcal for that run. There is no "good" number. A higher result just means a heavier body, a longer run or both.

Why Distance Matters More Than Speed

Running faster raises your burn per minute, but it also ends the run sooner. Margaria and colleagues found that the net cost of running is about 1 kcal per kg per km on level ground, and does not depend on speed³. So for the same distance, a slow run and a fast run cost nearly the same. The compendium numbers agree. Per kg per km, they stay between about 0.9 and 1.07 kcal from 4 to 14 mph (our calculation from the published values)². The practical result is simple: running twice as far burns about twice as many calories, but running much faster does not.

Gross Versus Net Calories

Gross calories include the resting energy you would use anyway. Net calories are only the extra from running. The compendium formula gives gross. The "1 kcal per kg per km" rule is net, so it can look larger or smaller than your result depending on speed. The ACSM running equation is another gross method. It adds 0.2 ml of oxygen per kg per metre of speed to a resting 3.5 ml/kg/min⁴. In a study of adults, it was one of the two best predictors of measured running energy use⁵. Our own check found it gives results 10 to 17 percent higher than the compendium method for the same run, so no single method is exact.

Treadmill Versus Outdoor Running

Without wind, a treadmill takes less effort than outdoor running. In nine trained men, a 1% treadmill incline matched the oxygen cost of outdoor running at speeds from about 6.5 to 11 mph⁶. This calculator does not ask about incline or terrain. It assumes steady running on level ground. Hills, trails and stop-start intervals will change your real burn.