BMR Calculator
Basal metabolic rate, or BMR, is the energy your body uses to keep itself running while you rest. This page estimates it from your size, age and sex.
- Free
- Works offline after your first visit
- Saves on this device
- No sign-up
- Updated
How it works
It uses the Mifflin-St Jeor equation: 10 times weight in kilograms, plus 6.25 times height in centimetres, minus 5 times age. Men add 5 and women subtract 161.
The result is a daily figure for rest only. Walking, work and exercise add to it.
Worked example
For a person 35 years old, 66 in tall and 150 lb, the estimated BMR is 1,392 calories a day at rest.
Questions
What is the difference between BMR and total calories?
BMR is what you use at rest. Your total for the day is higher, because movement and digestion add to it.
Why do formulas give different answers?
Each formula uses different inputs. Mifflin-St Jeor is one widely used published choice, and it is still an estimate.
Can BMR be used to plan food?
This shows one number only. Planning food changes is best done with a doctor or dietitian who knows your health.
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