What is BMR and why does it matter?

BMR (Basal Metabolic Rate) is the number of calories your body burns at complete rest to maintain vital functions like breathing, circulation, and cell production. It represents about 60-75% of your total daily calorie expenditure and is essential for understanding your baseline energy needs.

What's the difference between BMR and TDEE?

BMR is calories burned at rest, while TDEE (Total Daily Energy Expenditure) includes all calories burned including physical activity. TDEE = BMR × Activity Multiplier. Use TDEE for meal planning and BMR to understand your baseline metabolism.

Which BMR formula is most accurate?

The Mifflin-St Jeor equation is generally considered most accurate for modern populations. The Harris-Benedict equation, developed in 1919, may overestimate calorie needs by 5-15%. However, individual results can vary based on body composition and genetics.

Can I increase my BMR?

Yes! Building muscle mass through strength training is the most effective way to increase BMR, as muscle tissue burns more calories at rest than fat. Other factors include getting adequate sleep, eating enough protein, and staying hydrated.

BMR Calculator

Calculate your Basal Metabolic Rate (BMR) to understand how many calories your body burns at rest. Get personalized daily calorie needs based on your activity level.

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BMR is the number of calories your body burns at complete rest. Most adults have a BMR between 1,200-2,000 calories per day.

Calculate your exact BMR and daily calorie needs below.

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BMR Formula

Mifflin-St Jeor

Most accurate for modern populations

Harris-Benedict

Classic formula (may overestimate)

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Last updated: January 2026 • Built with care by iForge Apps

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