About This Calculator
This calculator uses the Katch-McArdle Equation to estimate your Basal Metabolic Rate (BMR) based on lean body mass. It is ideal for individuals who know their body fat percentage and want a more accurate result.
How It Works
- Enter your lean body mass (LBM) in kilograms or pounds.
- The calculator converts pounds to kilograms if needed.
- It uses the following formula to estimate BMR:
BMR = 370 + 21.6 × LBM (kg)
Frequently Asked Questions
What is Lean Body Mass?
Lean Body Mass includes everything in your body except fat—such as muscle, bone, organs, and water.
Is this calculator more accurate?
Yes, if you know your body fat percentage. It focuses on metabolically active tissue, unlike formulas based on total weight.
Can I enter lean mass in pounds?
Yes, just select the appropriate unit. The calculator will automatically convert it to kilograms for calculation.