BMR Calculator: Calories Your Body Burns at Rest

Your BMR is the energy your body uses at rest. This calculator uses the Mifflin-St Jeor equation and shows the calories you need for each activity level.

loading tool

How to use the bmr calculator

1. Type your numbers in the boxes (pick your currency or units if asked).
2. The answer updates as you type: no button to press.
3. Copy the result, or share it on WhatsApp with one tap.

Questions

How do I lose weight with this?

Eat about 500 calories a day less than your activity-level number to lose roughly 0.5 kg (1 lb) a week.

Is my data private?

Yes. Everything happens inside your own browser: nothing you type or choose is uploaded to us or anyone else.

Is it free?

Completely free, with no sign-up, no watermark and no limit on how many times you use it. Light ads keep the site running.