Lean Body Mass Calculator
Calculate lean body mass and muscle-to-fat ratio using the Boer formula for body composition tracking
About this calculator
The Lean Body Mass Calculator uses the scientifically validated Boer formula to determine your lean body mass and muscle-to-fat ratio based on your height, weight, age, and gender. This tool helps fitness enthusiasts, athletes, and health-conscious individuals track their body composition changes over time, providing more accurate insights than BMI alone. Understanding your lean body mass is crucial for setting realistic fitness goals, monitoring muscle gain or loss, and optimizing nutrition and training programs.
How to use
Enter your gender, age, height, and current weight into the calculator fields. The tool will automatically apply the Boer formula to calculate your lean body mass in pounds or kilograms. Review your results to understand your muscle-to-fat ratio and track changes over time.
Frequently asked questions
What is lean body mass?
Lean body mass is your total body weight minus fat mass, including muscles, bones, organs, and water content.
How accurate is the Boer formula?
The Boer formula is considered highly accurate for estimating lean body mass, with correlation coefficients above 0.9 in scientific studies.
How often should I measure lean body mass?
Measure monthly or bi-weekly for tracking progress, as lean body mass changes gradually over time with consistent training.