Lean Body Mass Calculator

This Lean Body Mass Calculator helps you estimate how much of your weight is made up of lean tissue—such as muscles, bones, organs, and water. As a result, it’s especially useful for people who want to track progress beyond the basic scale weight.

Note: This calculator uses the Boer formula, which is known for being reliable and gender-specific.

What Is Lean Body Mass?

Lean body mass (LBM) is everything in your body except fat. This includes muscles, bones, water, organs, and skin. Because it focuses on fat-free mass, it’s a valuable indicator of your physical fitness.

How the Calculator Works

This calculator uses the Boer formula. Since it factors in both height and weight, it gives a more personalized result. Additionally, it’s tailored for male and female bodies separately.

Why Tracking Lean Mass Is Important

While weight alone doesn’t show your health status, lean mass does. For example, someone may lose weight but also muscle, which is not ideal. Therefore, checking lean mass helps you set better fitness goals.

If you’re trying to lose fat or build muscle, tracking LBM shows you what’s really changing. In short, it tells you whether you’re losing fat or muscle.

For more accuracy, you can also check your Body Fat Percentage alongside this result. Additionally, compare your result with our BMI Calculator for a broader picture.

Disclaimer: This calculator is for informational purposes only. Always consult a qualified healthcare provider before making health-related decisions.