How it works
Mifflin–St Jeor resting metabolic rate and activity-adjusted expenditure.
Worked calculation
Compare baseline energy needs with an activity-adjusted estimate. For the sample inputs, the calculator displays these results:
| Estimated BMR | 1,426.5 kcal/day |
|---|---|
| Estimated maintenance calories | 2,139.75 kcal/day |
Assumptions and limitations
A simplified model cannot account for all physiology or medical conditions.
Results update as you change inputs. The values are calculated from the displayed inputs and assumptions, not obtained from an external measurement. Check units, rounding, and any special rules that apply to your situation.
Further reading and source context
For background and independently maintained guidance, see NIH Body Weight Planner. This source supplies context rather than personalized verification of the calculator output.
Resting energy versus daily expenditure
Basal metabolic rate estimates energy use at rest. Daily energy expenditure adds an activity assumption, so two people with the same resting estimate can have different daily needs.
How to read the result
Small changes in the activity multiplier can noticeably change the estimate. Use consistent units and avoid presenting this number as a measured metabolic rate.