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What is BMR Calculator?
Calculate your Basal Metabolic Rate (BMR) — the number of calories your body burns at rest. Understanding your BMR is essential for weight management, nutrition planning, and fitness goal setting.
Key Features
How to Use BMR Calculator
Enter your age, weight, and height
Select your gender
Choose activity level
View your BMR and daily calorie needs
Common Use Cases
Tips & Best Practices
BMR decreases with age — recalculate periodically
To lose weight, eat 300-500 calories below your TDEE
To gain muscle, eat 200-400 calories above your TDEE
Frequently Asked Questions
What is BMR?
Basal Metabolic Rate is the number of calories your body needs to maintain basic functions (breathing, circulation, cell production) while at complete rest.
How is TDEE different from BMR?
TDEE (Total Daily Energy Expenditure) = BMR × activity multiplier. It accounts for exercise and daily activity, giving your total calorie needs.
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BMR Calculator is part of our Medical tools collection at AllInAOne. Use our free online tools for all your medical needs — no registration required.