🔥 Health Calculator

BMR Calculator

Calculate your Basal Metabolic Rate — the calories your body burns at complete rest. Supports both Mifflin-St Jeor and Harris-Benedict equations.

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Fill in age, sex, height and weight to calculate your BMR.

BMR Formulas Used

Mifflin-St Jeor (Men): (10 × kg) + (6.25 × cm) − (5 × age) + 5

Mifflin-St Jeor (Women): (10 × kg) + (6.25 × cm) − (5 × age) − 161

Harris-Benedict (Men): 88.36 + (13.4 × kg) + (4.8 × cm) − (5.68 × age)

Harris-Benedict (Women): 447.6 + (9.25 × kg) + (3.1 × cm) − (4.33 × age)

Frequently Asked Questions

What is BMR?
Basal Metabolic Rate (BMR) is the minimum number of calories your body needs to function at complete rest — essentially keeping you alive. It accounts for about 60–70% of total daily calorie burn.
Which formula is more accurate?
The Mifflin-St Jeor equation is generally considered more accurate for most people. The Harris-Benedict formula tends to slightly overestimate BMR. Both are estimates with roughly ±10% accuracy.
How do I use BMR to plan my diet?
Multiply your BMR by your activity level to get your TDEE (Total Daily Energy Expenditure). Then adjust calories up or down relative to your TDEE based on your weight goal.