Calculate your Basal Metabolic Rate (BMR) — the calories your body burns at complete rest. This is your body's minimum energy requirement for vital functions like breathing, circulation, and cell production.
Enter Your Measurements
Results
Your BMR
1,760
kcal/day
Mifflin-St Jeor BMR
1,760
kcal
Harris-Benedict BMR
1,835
kcal
Formula
How to Use This Calculator
How to Use
- 1
Enter your age, weight, height, and sex.
- 2
Select the formula (Mifflin-St Jeor is more accurate for most people).
- 3
Multiply BMR by your activity factor to get TDEE.
Frequently Asked Questions
Frequently Asked Questions
What's the difference between BMR and TDEE?
In-Depth Guides
How to Calculate Your TDEE: Complete Nutrition Guide
Learn exactly how to calculate your Total Daily Energy Expenditure using the Mifflin-St Jeor formula. Includes activity multipliers, accuracy tips, and how to use TDEE for fat loss or muscle gain.
Basal Metabolic Rate (BMR): Formulas and How to Use Yours
Understand BMR, compare Mifflin-St Jeor vs Harris-Benedict formulas, and learn how to use your BMR to set calorie goals.
How to Calculate a Calorie Deficit for Weight Loss
Step-by-step guide to calculating a sustainable calorie deficit using your TDEE, with tips on how large a deficit to use and how to track it.
Basal Metabolic Rate (BMR): What It Is and How to Calculate It
Understand your basal metabolic rate, how it's calculated using the Mifflin-St Jeor equation, and how to use BMR for weight management.
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About This Calculator
This calculator uses the formula: Mifflin-St Jeor Male: 10×kg + 6.25×cm − 5×age + 5; Female: 10×kg + 6.25×cm − 5×age − 161. All calculations follow industry-standard methods. Results are estimates — always verify with a licensed professional for structural or code-compliant work.
Built and maintained by the CalcSmart team. Last updated March 2026.
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