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BMR Calculator

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BMR Calculator computes your Basal Metabolic Rate — calories burned at complete rest — using the Mifflin-St Jeor equation, the most accurate formula for healthy adults. Enter weight, height, age, and biological sex to see your daily calorie burn at rest. Multiply by an activity factor to estimate your TDEE (Total Daily Energy Expenditure). Runs in your browser.

Related: Calorie Calculator (TDEE)BMIWater Intake

Your files and inputs stay in your browser — nothing is uploaded or stored.

Basal Metabolic Rate

1618 kcal/day

Calories burned at complete rest

Formula

Mifflin–St Jeor

Most accurate for general population

BMR is your calorie need at rest. Multiply by an activity factor to get your TDEE.

Basal Metabolic Rate (BMR) calculator

BMR is the number of calories your body burns at rest to maintain basic functions (breathing, circulation, organ function). Calculated using the Mifflin–St Jeor equation — the most accurate formula for the general population. Multiply BMR by your activity factor (TDEE) to estimate daily caloric needs.