BMR Calculator
Calculate your Basal Metabolic Rate and daily calorie needs
BMR (Basal Metabolic Rate) is the number of calories your body burns at complete rest just to maintain basic functions like breathing and circulation. This calculator uses the Mifflin-St Jeor formula (a widely-used, accurate estimation method) to calculate your BMR from your age, sex, height, and weight.
Frequently asked questions
It's the foundation for calculating your total daily calorie needs - combined with your activity level, BMR helps estimate how many calories you actually burn in a day, which is useful for weight management planning.
Mifflin-St Jeor is widely regarded by nutrition professionals as one of the more accurate BMR estimation formulas compared to older equations, which is why it's commonly used in modern calculators.
No - BMR is your calorie burn at complete rest. Your actual daily calorie needs (and any target for weight loss/gain) also depends on your activity level on top of BMR.