What Is BMR?
Your Basal Metabolic Rate (BMR) is the number of calories your body needs to perform basic life-sustaining functions like breathing, circulation, and cell production while at complete rest. It accounts for about 60-75% of your total daily calorie expenditure.
The Mifflin-St Jeor Formula
The most accurate formula for calculating BMR is the Mifflin-St Jeor equation: Men: 10 × weight(kg) + 6.25 × height(cm) — 5 × age(y) + 5. Women: 10 × weight(kg) + 6.25 × height(cm) — 5 × age(y) — 161.
Why BMR Matters
Knowing your BMR helps you set realistic calorie targets. Eating below your BMR for extended periods can slow your metabolism and lead to muscle loss, which is why crash diets often fail long-term.
Use Our Calculator
Try our free BMR calculator to find your basal metabolic rate instantly and plan your nutrition accordingly.