How this instrument works
Running's energy cost rises steadily and almost linearly with speed, more predictably than most other activities in the Compendium of Physical Activities. That's why this calculator offers eight distinct pace brackets instead of a single "running" option: general self-selected pace (7.5 MET) sits in the middle, while dedicated brackets run from a 4-4.2 mph jog (6.5 MET) up to a 10 mph sprint pace (14.8 MET) — roughly double the energy cost per hour between the slowest and fastest options.
Pick the bracket that matches your actual sustained pace for the run, not your fastest interval or your slowest recovery jog within it. If you don't track pace precisely — no GPS watch, running on a treadmill without a clear speed readout, or running purely by feel — the general self-selected pace option (7.5 MET) is a reasonable default, since it represents an average across runners choosing their own comfortable effort.
As with every calculator on this site using the Compendium, the formula is kcal = MET x body weight in kilograms x duration in hours. It's a solid estimate for flat, level running; terrain, grade, wind, and running economy — how efficiently your particular stride uses oxygen at a given pace — will all shift your real energy cost up or down from what the bracket predicts, sometimes by a meaningful margin on hilly trail runs.
- Select the pace bracket closest to your actual sustained running speed for the session.
- Enter your body weight in kilograms.
- Enter your total running duration in minutes.
- Read the estimated calories burned in kcal for that run.
- For a run with major pace changes — intervals, a warm-up jog, a hard tempo segment — calculate each pace segment separately and add the totals.
Worked example — general self-selected pace, 70 kg, 60 minutes
A 70 kg runner completing a full 60-minute run at a comfortable, self-selected pace (7.5 MET, Compendium code 12020): 7.5 x 70 x 1 = 525 kcal for that hour.
Push the pace up to a genuine 10 mph sprint bracket for an 80 kg runner over 45 minutes instead, and the estimate jumps to 14.8 x 80 x 0.75 = 888 kcal — nearly 70% more calories in a quarter less time, the direct calorie payoff of running measurably faster rather than longer.
Questions
Which pace bracket should I pick if I don't track my exact speed?
Use general, self-selected pace (7.5 MET) — it's the Compendium's measured average for runners choosing their own comfortable effort rather than holding a specific mph target. It's a reasonable default for treadmill runs without a clear pace display, trail runs where pace varies constantly, or any run you did purely by feel.
How much more does a faster pace actually cost in calories?
Substantially more — the brackets here run from 6.5 MET at 4-4.2 mph up to 14.8 MET at 10 mph, more than doubling. For a 70 kg runner over the same 30 minutes, that's the difference between roughly 227.5 kcal at the slower bracket and well over 400 kcal at the fastest one — pace has a bigger effect on total calorie burn than almost any other single choice you can make about a run.
Does this account for hills or trail running?
No — the Compendium's pace-based MET values were measured on level ground at a steady speed, so uphill running, technical trail terrain, and significant elevation gain all cost more energy than this estimate shows at the same pace. If most of your run is genuinely hilly, treat the result as a floor rather than a precise figure.
My treadmill pace and my outdoor pace feel different for the same speed — why?
Outdoor running adds air resistance and requires you to actively propel yourself forward, while a treadmill belt does some of that work for you at a given speed, especially left at a flat 0% incline. Many runners find a small incline, commonly 1%, on the treadmill makes effort feel closer to an equivalent outdoor pace, though the Compendium's brackets don't build in that adjustment automatically.
Why does running have so many more pace options than other calorie calculators here?
Because pace is unusually predictive of running's energy cost — it rises steadily and almost linearly with speed in a way that isn't true for activities like weight lifting or standing, where effort is harder to reduce to a single continuous number. The Compendium reflects that by measuring running at many discrete mph brackets, giving this calculator more granularity to work with.