BMR Calculator

Calculate your Basal Metabolic Rate (BMR) — the number of calories your body burns at rest each day.

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What is BMR?

Basal Metabolic Rate (BMR) is the number of calories required to keep your body functioning at rest. BMR is also known as your body's metabolism. This calculator uses the Mifflin-St Jeor equation, which is considered the most accurate formula for most people.

Mifflin-St Jeor Formula

Male: BMR = 10×weight(kg) + 6.25×height(cm) − 5×age + 5Female: BMR = 10×weight(kg) + 6.25×height(cm) − 5×age − 161

Frequently Asked Questions

What is the difference between BMR and TDEE?

BMR is the calories burned at complete rest. TDEE (Total Daily Energy Expenditure) factors in your activity level on top of BMR.

Which BMR formula is most accurate?

The Mifflin-St Jeor equation is widely considered the most accurate for most people. The Harris-Benedict equation is also commonly used.

Does BMR change with age?

Yes, BMR generally decreases with age as muscle mass tends to decline. Regular strength training can help maintain a higher BMR.