BMR Calculator
Calculate your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor equation. Find out how many calories your body burns at rest.
Mifflin-St Jeor Equation
Women: BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age) − 161
The Mifflin-St Jeor equation is considered the most accurate formula for estimating BMR in healthy individuals. It calculates the energy your body needs to maintain basic functions like breathing, circulation, and cell production.
BMR = (10 × 70) + (6.25 × 175) − (5 × 30) + 5
BMR = 700 + 1093.75 − 150 + 5 = 1,648.75 calories/day
What is BMR?
Basal Metabolic Rate (BMR) is the number of calories your body needs to perform basic life-sustaining functions. This includes breathing, blood circulation, nutrient processing, and cell production. BMR accounts for about 60–75% of your total daily calorie expenditure.
Factors That Affect BMR
- Muscle mass: More muscle increases BMR
- Age: BMR decreases with age
- Body size: Larger bodies have higher BMR
- Gender: Males typically have higher BMR
- Genetics: Natural metabolic rate varies between individuals
FAQ
What's the difference between BMR and TDEE?
BMR is calories burned at complete rest. TDEE (Total Daily Energy Expenditure) includes BMR plus calories burned through activity and exercise.
Should I eat my BMR calories?
You should generally eat more than your BMR since you need additional calories for daily activities. Use TDEE as a better guide for daily calorie intake.
⚠️ Medical Disclaimer: This calculator provides estimates for informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Consult a healthcare provider before making dietary or exercise changes.
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Last updated: 2026-08-08