Find your BMR using the Mifflin-St Jeor equation.
Enter your weight in kilograms, height in centimeters, and age in years. Select your gender.
Click "Calculate" to see the number of calories your body needs at complete rest to maintain vital functions like breathing, circulation, and cell production.
Your BMR represents the minimum energy your body requires daily. Actual calorie needs are higher once activity is factored in.
The Mifflin-St Jeor equation (1990) is used:
Men: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age(years) − 5
Women: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age(years) − 161
Example 1: A 35-year-old male, 90 kg, 182 cm.
Example 2: A 28-year-old female, 60 kg, 165 cm.
BMR is the number of calories your body needs to perform basic life-sustaining functions such as breathing, blood circulation, nutrient processing, and cell production while at complete rest.
The Mifflin-St Jeor equation, published in 1990, has been shown in multiple studies to be more accurate than the original Harris-Benedict equation from 1919, with a typical accuracy within 10% of measured values.
Yes. BMR typically decreases by about 1-2% per decade after the age of 20, primarily due to loss of lean muscle mass and hormonal changes.
Building muscle through strength training is the most effective way to raise your BMR, since muscle tissue burns more calories at rest than fat tissue.