BMR Calculator

What is BMR?

Basal Metabolic Rate (BMR) is the number of calories your body burns at rest to maintain basic life functions. It accounts for about 60-75% of your total daily calorie expenditure.

How to Use This Calculator

Enter your age, gender, weight, and height. The calculator uses the Mifflin-St Jeor Equation, considered the most accurate BMR formula, to estimate your daily calorie needs at rest.

Mifflin-St Jeor Formula

• Men: BMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age + 5
• Women: BMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age - 161

Why BMR Matters

Knowing your BMR helps you understand your baseline calorie needs. To lose weight, you need to consume fewer calories than your BMR plus activity level burns.

FAQ

Does BMR vary with age?
Yes, BMR tends to decrease with age. Muscle mass also affects BMR - more muscle means higher BMR.