BMR Calculator

Free BMR calculator. Calculate your Basal Metabolic Rate and TDEE to understand your daily energy expenditure.

How the BMR Calculator works

BMR is estimated using the Mifflin-St Jeor equation, which accounts for weight, height, age, and sex. It represents the calories your body burns at complete rest just to maintain vital functions. TDEE is then derived by multiplying BMR by an activity-level factor.

Formula

BMR = 10×weight(kg) + 6.25×height(cm) − 5×age + s

How to use the BMR Calculator

  1. 1The BMR calculator is designed to be simple and fast.
  2. 2Enter your gender, age, height, and weight.
  3. 3Select your activity level.
  4. 4See your BMR and TDEE.
  5. 5Your result is shown immediately.

Examples

  • Male, 30yr, 175cm, 70kg = BMR 1,640 kcal
  • Female, 25yr, 165cm, 60kg = BMR 1,354 kcal

Benefits

  • Completely free with no signup required.
  • Runs entirely in your browser for instant results and privacy.
  • Works on mobile, tablet and desktop.
  • Results can be copied with one click.

Frequently Asked Questions

Is the BMR calculator free to use?

Yes. The BMR calculator is 100% free, with no signup, no watermark and no hidden limits.

Does the BMR calculator store my data?

No. All calculations and processing happen locally in your browser. Nothing is uploaded to a server.

Does the BMR calculator work on mobile?

Yes. The BMR calculator is fully responsive and works on phones, tablets and desktop computers.

What is BMR vs TDEE?

BMR (Basal Metabolic Rate) is calories burned at complete rest. TDEE (Total Daily Energy Expenditure) multiplies BMR by your activity level to estimate total daily calorie burn.

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