BMR Calculator
Calculate your Basal Metabolic Rate (BMR) — the number of calories your body burns at rest. This is the minimum energy needed to keep your body functioning.
For more accurate Katch-McArdle calculation
About BMR
What is BMR?
Basal Metabolic Rate (BMR) is the number of calories your body needs to perform basic life-sustaining functions like breathing, circulation, cell production, and nutrient processing while at complete rest. It represents about 60-75% of daily calorie expenditure.
BMR vs TDEE
BMR is just the calories burned at rest. Your Total Daily Energy Expenditure (TDEE) includes BMR plus calories burned through daily activities, exercise, and digestion. Use your BMR as a starting point to calculate your TDEE.
Which formula is best?
The Mifflin-St Jeor equation is generally considered the most accurate for most people. If you know your body fat percentage, the Katch-McArdle formula may be more accurate, especially for very lean or muscular individuals.
How We Calculate Your BMR
Mifflin-St Jeor Equation
Men: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age) + 5
Women: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age) - 161
Harris-Benedict Equation (Revised)
Men: BMR = 88.362 + (13.397 × weight) + (4.799 × height) - (5.677 × age)
Women: BMR = 447.593 + (9.247 × weight) + (3.098 × height) - (4.330 × age)
Katch-McArdle Formula
BMR = 370 + (21.6 × Lean Body Mass in kg)
Requires body fat percentage. Lean Body Mass = Weight × (1 - Body Fat %)
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