Nutrition tool
BMR calculator
Calculate your Basal Metabolic Rate — the energy your body burns at complete rest — using the Mifflin-St Jeor equation from your sex, age, height and weight.
Calories burned at complete rest. Multiply by an activity factor for maintenance — see the TDEE calculator.
The basics
What is BMR?
Your Basal Metabolic Rate (BMR) is the number of calories your body burns at rest just to keep you alive. It's the foundation for working out how much you should eat — your maintenance calories are your BMR multiplied by an activity factor. We use the Mifflin-St Jeor equation, the most accurate of the common formulas.
How to use it
- 1Enter your details. Select your sex and enter your age, height and weight.
- 2Read your BMR. Your resting calorie burn is calculated with Mifflin-St Jeor.
- 3Find maintenance. Use the TDEE calculator to turn BMR into daily maintenance calories.
FAQ
BMR Calculator — questions
What is BMR and how is it calculated?
BMR is the calories you burn at rest. The Mifflin-St Jeor equation calculates it as (10 × weight in kg) + (6.25 × height in cm) − (5 × age) + 5 for men, or − 161 for women.
What's the difference between BMR and TDEE?
BMR is your at-rest burn; TDEE (Total Daily Energy Expenditure) is BMR multiplied by an activity factor — the calories you actually burn in a day. TDEE is what you base your diet on.
Put it to work
Turn your number into a plan
A calculator gives you a number. Coaching turns it into a programme that adapts to your data — start with the guide and the matching programme.
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