How to Use BMR Calculator
Calculate your Basal Metabolic Rate using the accurate Mifflin-St Jeor equation from your sex, age, height and weight. BMR is the foundation for working out your daily calorie needs.
Open the BMR Calculator tool →What is BMR Calculator?
Find your Basal Metabolic Rate — the calories your body burns at complete rest. It's completely free, needs no sign-up, and runs entirely in your browser — so it's fast and private.
How to use BMR Calculator
- Open the BMR Calculator tool.
- Enter your details or values.
- The result is calculated instantly.
- Copy or use the result. Everything runs in your browser — nothing is uploaded.
Frequently asked questions
What is BMR?
Your Basal Metabolic Rate — the calories your body burns at complete rest to keep basic functions running.
How is it calculated?
From your age, sex, height and weight using a standard equation such as Mifflin-St Jeor.
Is this medical advice?
No — it's an estimate for general fitness planning, not a substitute for professional guidance.
Ready to try it?
Open BMR Calculator →