BMR Calculator – Basal Metabolic Rate

What is BMR?

Basal Metabolic Rate (BMR) is the number of calories your body needs to perform basic life-sustaining functions such as breathing, circulation, and cell production while at complete rest. Knowing your BMR helps you understand how many calories you need daily to maintain your current weight.

How is BMR Calculated?

This calculator uses the Mifflin-St Jeor Equation, which is considered the most accurate formula for estimating BMR:

• For Men: BMR = (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) + 5
• For Women: BMR = (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) – 161

Example Calculation

A 30-year-old male who weighs 70 kg and is 175 cm tall:

BMR = (10 × 70) + (6.25 × 175) – (5 × 30) + 5 = 700 + 1093.75 – 150 + 5 = 1648.75 kcal/day

Why Use This Calculator?

Understanding your BMR allows you to tailor your calorie intake based on your goals — whether you want to lose weight, gain muscle, or maintain your current physique. It's an essential starting point for any nutrition or fitness plan.