BMR Calculator
Basal Metabolic Rate (BMR) is the number of calories your body burns at rest to maintain vital functions like breathing and circulation.
Your Details
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calories/day at complete rest
Mifflin-St Jeor
cal/day
Most accurate for modern populations
Harris-Benedict
cal/day
Classic equation (1919)
Daily Calorie Needs by Activity
Sedentary
Little or no exercise
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cal/day
Light
Exercise 1-3 days/week
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cal/day
Moderate
Exercise 3-5 days/week
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cal/day
Active
Exercise 6-7 days/week
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cal/day
Very Active
Hard exercise daily
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cal/day
What is BMR?
BMR represents the minimum calories your body needs to function at rest. This includes breathing, circulation, cell production, and nutrient processing. Your actual daily calorie needs (TDEE) are higher based on activity level.
How BMR is Calculated
We use the Mifflin-St Jeor equation, considered the most accurate for estimating BMR in modern populations. This formula was developed in 1990 and is recommended by the Academy of Nutrition and Dietetics.
"More accurate than Harris-Benedict for today's population due to changes in body composition and lifestyle."
The Formula
Men:
BMR = (10 × weight kg) + (6.25 × height cm) − (5 × age) + 5
Women:
BMR = (10 × weight kg) + (6.25 × height cm) − (5 × age) − 161