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BMR Calculator (Basal Metabolic Rate)

Your BMR (basal metabolic rate) is the number of calories your body burns if you rested all day — for breathing, heartbeat and other basic functions. This calculator uses the Mifflin-St Jeor formula, the most widely used modern standard.

kg
cm
years

Result

1,718 kcal/dag

BMR (calories at rest)

How this was calculated
  1. 1Base: 10×weight + 6.25×height − 5×age10×75 + 6,25×178 − 5×30 = 1,713
  2. 2+5 (male)

Formula

Male: BMR = 10×weight + 6.25×height − 5×age + 5 • Female: −161 instead of +5

Weight in kg and height in cm contribute positively to your BMR because more body mass costs more energy to maintain. Age subtracts, because metabolism gradually slows with the years. The difference between men and women accounts for a typically higher muscle mass in men.

Worked examples

Male, 80 kg, 180 cm, 30 years

→ BMR = 1780 kcal/day.

Common mistakes

  • Confusing BMR with your total daily calorie burn; BMR is only the resting rate, not including activity.

Limitations

  • This formula is a population-level estimate; individual metabolisms can differ due to muscle mass, hormones and genetics.

When to use it

  • Determining the starting point for calculating your total daily calorie burn.

Frequently asked questions

What is the difference between BMR and TDEE?

BMR is your burn at complete rest; TDEE (total daily energy expenditure) also includes your daily activity and exercise.

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