BMR Calculator

Calculate your Basal Metabolic Rate (BMR).

Basal Metabolic Rate (BMR) 1,620 kcal / day

Age (years)

Biological Sex

Height

Weight

About BMR Calculator

Your Basal Metabolic Rate (BMR) represents the calories your body requires to perform basic life-sustaining functions at rest. RealOnlineTools provides an on-device metabolic rate calculator.

It supports the Mifflin-St Jeor and Harris-Benedict formulas to help you understand your baseline daily energy expenditures.

Frequently Asked Questions

How do I accurately calculate my BMR manually?

For Mifflin-St Jeor, the formulas are: Men BMR = 10 * weight (kg) + 6.25 * height (cm) - 5 * age (years) + 5; Women BMR = 10 * weight (kg) + 6.25 * height (cm) - 5 * age (years) - 161.

What is the difference between BMR and TDEE in health?

BMR is the caloric rate burned at absolute rest, while TDEE accounts for your BMR multiplied by your daily physical activity level.

Is an online BMR calculator accurate for resting metabolic rates?

Yes, our tool applies standard clinical formulas precisely. Since it runs client-side, your weight, height, and age stay secure.