BMR Calculator
Find your basal metabolic rate — the calories your body burns at complete rest.
Inputs
Formula
- Men: BMR = 10w + 6.25h − 5a + 5
- Women: BMR = 10w + 6.25h − 5a − 161
The Mifflin–St Jeor equation estimates the energy your body needs just to keep the heart, brain and organs running for 24 hours. It is the base number every diet plan starts from — your daily needs are BMR multiplied by an activity factor.
Step-by-step calculation
- 1
Mifflin–St Jeor
10w + 6.25h − 5a ± c
1,630 kcal
Frequently asked questions
What does the BMR Calculator do?
Find your basal metabolic rate — the calories your body burns at complete rest. The BMR Calculator on OneCalcApp returns the result instantly as you type, together with the formula and the substituted values.
How do I use the BMR Calculator?
Enter your values in the input fields, choose the relevant units or options, and the BMR Calculator recalculates automatically. You can copy, print or export the result.
Is the BMR Calculator free to use?
Yes. The BMR Calculator is completely free, needs no sign-up and has no usage limit on OneCalcApp.
How accurate is the BMR Calculator?
It uses the standard formula Men: BMR = 10w + 6.25h − 5a + 5 and full double-precision arithmetic, so results match a manual calculation to the displayed number of digits.
Does the BMR Calculator work on mobile and offline?
Yes. The BMR Calculator runs entirely in your browser on phones, tablets and desktops, and your inputs never leave your device.
Where can I find related tools?
OneCalcApp hosts 300+ calculators and converters, including the full Health collection. Related tools are linked at the bottom of every page.
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