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BMR Calculator

Find your Basal Metabolic Rate — the calories your body burns at rest.

Last updated: 8 Aug 2026

Quick answer

Your BMR (Basal Metabolic Rate) is the calories your body burns at rest. Using the Mifflin-St Jeor formula: men = 10×weight(kg) + 6.25×height(cm) − 5×age + 5; women subtract 161 instead of adding 5. For example, a 30-year-old woman, 165 cm, 60 kg has a BMR of about 1,320 kcal/day. Enter your details above to calculate it instantly.

Your Basal Metabolic Rate (BMR) is the number of calories your body needs to keep functioning at complete rest. It is the starting point for working out your daily calorie needs. This calculator uses the widely-trusted Mifflin-St Jeor equation.

How to calculate your BMR

  1. 1 Select your gender and enter your age.
  2. 2 Enter your height in centimetres and weight in kilograms.
  3. 3 We apply the Mifflin-St Jeor equation.
  4. 4 Your BMR in calories per day is shown instantly.

Frequently asked questions

What is BMR?
BMR is the energy (in calories) your body uses at rest to maintain vital functions like breathing, circulation and cell production.
Which formula is most accurate?
The Mifflin-St Jeor equation is considered the most accurate for most people and is used here.
How do I turn BMR into daily calories?
Multiply your BMR by an activity factor (1.2 sedentary to 1.9 very active) — our Calorie (TDEE) calculator does this for you.

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