BMR Calculator
Estimate how many calories your body burns at complete rest using two widely used medical formulas.
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| Formula | BMR (kcal/day) |
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BMR is the number of calories your body burns at rest. Multiply by your activity level to estimate total daily calories. See our BMR guide or use the TDEE calculator.
What is BMR?
Basal Metabolic Rate (BMR) represents the minimum energy your body needs to maintain vital functions—breathing, circulation, cell repair—while at rest. It typically accounts for 60–75% of your total daily calorie expenditure.
The Mifflin-St Jeor equation is generally considered more accurate for modern populations. Harris-Benedict is an older formula still used for comparison. For personalized medical advice, consult a healthcare professional.