Lean Body Mass (LBM) Calculator

Your Body Composition Estimate

Lean Body Mass

Fat Mass

Body Fat %

LBM Results From Different Formulas

Boer Formula
Hume Formula

What is Lean Body Mass (LBM)?

Lean Body Mass (LBM) represents the weight of everything in your body except for fat. This includes your muscles, bones, organs, skin, and water. It is a more precise measure of your body's metabolically active tissue compared to just total body weight.

Tracking your LBM is an excellent way to monitor the quality of your weight loss. A successful fitness plan aims to reduce fat mass while preserving or even increasing lean body mass. Since muscle tissue is denser and burns more calories than fat, a higher LBM leads to a higher resting metabolism.

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Frequently Asked Questions (FAQ)

What is the difference between LBM and muscle mass?

Lean Body Mass includes muscle mass, but it also includes the weight of your bones, organs, and body water. Muscle mass refers specifically to the weight of your muscles. Therefore, your LBM will always be higher than your muscle mass.

How accurate are these LBM formulas?

The Boer and Hume formulas are widely used estimations based on large population studies. While they are generally accurate for the average person, they are still estimates. Individual results can vary based on genetics, body type, and hydration levels. For a precise measurement, methods like a DEXA scan are considered the gold standard.

How can I increase my Lean Body Mass?

To increase LBM, you should focus on two main areas: 1) Resistance training (like weightlifting) to stimulate muscle growth, and 2) Consuming adequate protein to provide the building blocks for muscle repair and growth. A balanced diet and consistent exercise are key.