BMR Calculator
Calculate your Basal Metabolic Rate - calories burned at rest
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Your age in years
Biological sex for accurate calculation
About This Tool
Calculate your Basal Metabolic Rate (BMR) using multiple scientific formulas. BMR is the number of calories your body burns at complete rest to maintain vital functions like breathing, circulation, and cell production. Knowing your BMR is the first step to calculating your Total Daily Energy Expenditure (TDEE) for weight management.
Frequently Asked Questions
What is BMR?
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 accounts for 60-75% of your total daily calorie burn.
Which BMR formula is most accurate?
The Mifflin-St Jeor equation is considered the most accurate for most people today. The Harris-Benedict equation is older but still widely used. Mifflin-St Jeor tends to be more accurate for modern populations.
How is BMR different from TDEE?
BMR is calories burned at complete rest. TDEE (Total Daily Energy Expenditure) includes BMR plus calories burned through daily activities and exercise. TDEE is always higher than BMR.
Why does BMR matter for weight loss?
Knowing your BMR helps you calculate how many calories you need to maintain, lose, or gain weight. Eating below your BMR is not recommended as it can slow metabolism and cause muscle loss.
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