BMR Calculator
Enter your age, sex, height and weight to estimate your Basal Metabolic Rate (BMR) — the calories your body uses at complete rest.
Fill in your details to see your BMR.
About BMR
Your Basal Metabolic Rate is the foundation of any calorie or weight plan — it’s how many calories you’d burn if you did nothing but rest all day. Knowing your BMR helps you understand how much you can eat to maintain, lose or gain weight once activity is added.
⚕️ For general information only — not medical or dietary advice.
Frequently asked questions
What is BMR?
Basal Metabolic Rate is the number of calories your body needs to perform basic life-sustaining functions (breathing, circulation, cell production) while at complete rest.
Which formula do you use?
We use the Mifflin-St Jeor equation, which is widely considered one of the most accurate BMR formulas for most people.
How is BMR different from daily calories?
BMR is calories at rest. Your total daily calorie need is your BMR multiplied by an activity factor — use our Calorie Calculator for that.
Related tools
Use the Calorie Calculator or BMI Calculator.