What determines running energy use?
Distance, body mass, speed, terrain, and running economy all contribute. A simple calculator describes a representative session; it cannot reproduce laboratory oxygen-consumption measurements.
Using running pace to select intensity
Average speed selects the nearest published running-speed interval in the 2024 Adult Compendium, with equal-distance ties choosing the faster interval. The tool accepts 5 km/h through 14 mph (about 22.53 km/h), using reference values from 3.3 to 23 MET. Net energy subtracts a standard 1-MET resting baseline.
How to use this calculator
- 1Enter body weight and average running speed in km/h or mph.
- 2Enter the duration spent running at that approximate speed.
- 3Calculate distance and energy, then read the terrain and intensity assumptions.
Understanding your result
The result is a rough training-log estimate. Running pace may change within a session, and the average can hide intervals, walking breaks, or climbs. Fueling a long run also depends on duration, tolerance, and training needs beyond its calorie estimate.
Assumptions & limitations
- The model does not adjust for elevation, wind, surface, or individual running economy.
- Discrete speed bands can cause steps in the estimate near their boundaries.
Frequently asked questions
Does running faster always burn more calories over the same distance?+
Energy per minute generally rises with speed, but a faster run also takes less time. The total-distance comparison depends on efficiency and conditions.
Will this work for a trail run?+
It can provide a rough reference, but hills and technical terrain can substantially change the cost compared with the level-ground assumptions.
Can I use the result to plan race fueling?+
It is not a complete fueling plan. Carbohydrate needs, gut tolerance, race duration, hydration, and prior intake require separate consideration.
I know my distance and time. How do I find speed?+
Divide distance by time in hours, or use the running pace calculator. For example, 5 km in 30 minutes is 10 km/h.
