BMR Calculator

Calculate your basal metabolic rate — the calories your body burns at complete rest — using the trusted Mifflin-St Jeor equation.

Read the guide: What Is BMR and Why It's the Base of Every Calorie Plan

About you

Units
Sex

Basal metabolic rate

1,718 cal

Calories your body burns at rest each day

Per hour
72 cal
Method
Mifflin-St Jeor

BMR is the energy you'd burn at complete rest. Add activity with the TDEE calculator for daily needs. Informational only, not medical advice.

How it works

  1. 1

    Enter your details

    Add your sex, age, height and weight.

  2. 2

    Pick your units

    Switch between metric and imperial as needed.

  3. 3

    See your BMR

    View the calories your body burns at rest each day.

Instant & 100% private — nothing is uploaded

Every calculation runs locally in your browser. The measurements, dates and details you enter stay on your own device and are never sent to a server — nothing is stored, logged or shared.

Frequently asked questions

What is BMR?
Basal metabolic rate is the energy your body uses just to keep you alive at rest — breathing, circulation, cell repair. It is the floor of your daily calorie needs.
How is BMR different from TDEE?
BMR is calories burned at rest. TDEE adds the calories you burn through daily activity and exercise. Use the TDEE calculator for your full daily needs.
Is this medical advice?
No. These calculators are for general information and education only. They are not a diagnosis or a substitute for professional care — talk to a doctor or qualified clinician about your health.