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BMR Calculator

Your BMR is the number of calories your body needs just to keep you alive — breathing, circulation, cell production. Everything else is extra.

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Free to use — no sign-in required.
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Demo video coming soon

What you'll get

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BMR Estimate
Calories burned at complete rest using Mifflin-St Jeor formula.
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Formula Comparison
See results from multiple validated formulas.
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Metabolic Context
Understand what affects your metabolism.

How it works

  1. Enter your age, gender, height, and weight.
  2. Get your BMR calculated instantly.
  3. Understand your baseline calorie needs.

Frequently asked questions

What is BMR?

Basal Metabolic Rate is the energy your body uses at complete rest for basic functions like breathing and circulation.

How is BMR calculated?

We use the Mifflin-St Jeor equation, which research shows is the most accurate for most people.

BMR Calculator

Calculate your Basal Metabolic Rate to understand how many calories your body burns at rest.

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