The BMR Calculator estimates your Basal Metabolic Rate — the number of calories your body needs to perform basic functions such as breathing, circulation, and cell production while at rest.
Knowing your BMR can help you understand your daily calorie needs and support weight loss, maintenance, or muscle gain goals.
What Is Basal Metabolic Rate (BMR)?
Basal Metabolic Rate (BMR) represents the number of calories your body requires to maintain basic physiological functions at rest. These functions include breathing, blood circulation, body temperature regulation, and cell growth.
This calculator uses the Mifflin-St Jeor equation, which is widely considered one of the most accurate formulas for estimating BMR.
Men
BMR = (10 × weight) + (6.25 × height) − (5 × age) + 5
Women
BMR = (10 × weight) + (6.25 × height) − (5 × age) − 161
Your BMR can help determine daily calorie needs when combined with activity levels.