BMR Calculator
Calculate your Basal Metabolic Rate — the calories your body burns at rest. Uses the Mifflin-St Jeor equation.
Basal Metabolic Rate (BMR)
0 cal/day
Calories burned at complete rest
Based on Mifflin-St Jeor equation — the most accurate formula for most adults.
📐 Formula
Male BMR = (10 × weight kg) + (6.25 × height cm) − (5 × age) + 5. Female: same but −161 instead of +5. TDEE = BMR × Activity Factor
Frequently Asked Questions
BMR (Basal Metabolic Rate) is the calories your body burns at complete rest just to keep basic functions running. TDEE (Total Daily Energy Expenditure) is your BMR multiplied by an activity factor — it's how many calories you actually burn per day.
Mifflin-St Jeor is considered the most accurate general BMR formula, validated in multiple studies. It's accurate within ±10% for most adults. Athletes with very high muscle mass may find it slightly underestimates their BMR.
Eating 500 calories below your TDEE creates a 3,500 calorie weekly deficit — approximately 1 pound of fat loss per week. Never go below 1,200 calories (women) or 1,500 calories (men) without medical supervision.