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BMR Calculator

Calculate Basal Metabolic Rate using the Mifflin-St Jeor equation.

About this calculator

The BMR Calculator on NumberCals is a free, mobile-friendly tool for anyone needing to calculate basal metabolic rate using the mifflin-st jeor equation. Enter your values in the form below and the result is computed instantly — no sign-up, no installation, no waiting.

Formula used

BMR = 10·weight + 6.25·height − 5·age + s (s=+5 male, −161 female)

What you'll need

  • Weight (kg) (e.g. 70)
  • Height (cm) (e.g. 175)
  • Age (years) (e.g. 30)
  • Sex

What you'll get

  • BMR (kcal/day)
Formula
BMR = 10·weight + 6.25·height − 5·age + s (s=+5 male, −161 female)

Frequently Asked Questions

What is BMR? +

The number of calories your body needs at complete rest to maintain basic functions (breathing, circulation, cell production).

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