BMR Calculator

Calculate your Basal Metabolic Rate to understand your daily calorie needs at rest

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Your BMR Results

Basal Metabolic Rate

0 kcal

Calories needed at complete rest

Daily Calorie Needs

Based on your activity level:

Sedentary (little or no exercise) 0 kcal
Lightly active (light exercise 1-3 days/week) 0 kcal
Moderately active (moderate exercise 3-5 days/week) 0 kcal
Very active (hard exercise 6-7 days a week) 0 kcal
Extra active (very hard exercise, physical job) 0 kcal

Understanding BMR

Your Basal Metabolic Rate (BMR) is the number of calories your body needs to accomplish its most basic (basal) life-sustaining functions at complete rest. This includes processes like breathing, circulation, cell production, and nutrient processing.

Mifflin-St Jeor Equation

Currently considered the most accurate BMR formula for most people. It was developed in the 1990s and accounts for differences in body composition.

Harris-Benedict Equation

One of the oldest BMR equations, developed in 1919. The revised version from 1984 accounts for changes in lifestyle over time.

Activity Multipliers

To estimate total daily energy needs, BMR is multiplied by an activity factor that represents your typical daily physical activity level.

Factors Affecting BMR

BMR is influenced by age, gender, weight, height, body composition, genetics, and environmental factors like temperature.