BMR Calculator
Your Basal Metabolic Rate is the calories your body burns at complete rest. We show both trusted formulas side by side.
Mifflin-St Jeor
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Most accurate for most adults
Harris-Benedict (Revised)
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Classic 1984 revision
This is an estimate for information only — not medical advice.
How to use
- Select sex and enter age, weight (kg) and height (cm).
- Both BMR results update instantly as you type.
- Multiply BMR by your activity level for daily calorie needs (see our TDEE Calculator).
Frequently Asked Questions (FAQ)
What is BMR?
Your Basal Metabolic Rate is the calories your body burns at complete rest.
Which formulas does the BMR calculator use?
Mifflin-St Jeor and Harris-Benedict, shown side by side.
Do I enter my exercise in this calculator?
No. BMR covers only what your body burns at complete rest, so exercise is not part of it — activity calories sit on top of this number.
Why do the two formulas give different numbers?
They are two published equations built from different study data, so they usually give slightly different estimates. Seeing both side by side helps you compare.