Lean Body Mass Calculator

Estimate your muscle and body composition using Boer and James formulas.

Body Composition

Enter details for LBM estimation.

Gender

Weight (lbs)

Height (in)

Understanding the Lean Body Mass Calculator

Estimate your Lean Body Mass (LBM) - the weight of your body minus all fat mass.

Guide

How to use the Lean Body Mass Calculator

1Choose your unit system.
2Select your gender.
3Enter your weight and height.
4View your estimated LBM and Fat Mass distribution.

Applications

Common Use Cases

Athletic Performance: Monitoring muscle preservation during weight loss.

Metabolic Rate: LBM is the primary determinant of BMR.

Health Assessment: Differentiating between weight loss and muscle loss.

The Maths Behind the Calculation

Boer Formula

Men: 0.407 * Weight(kg) + 0.267 * Height(cm) - 19.2. Women: 0.252 * Weight(kg) + 0.473 * Height(cm) - 48.3. This formula is suitable for non-obese individuals.

Knowledge Base

Frequently Asked Questions

Is LBM the same as muscle mass?

Not exactly. LBM includes muscle, bone, water, organs, and skin. Everything *except* body fat. However, changes in LBM usually reflect changes in muscle and water.

How accurate is this without measurements?

This uses a predictive equation based on height and weight. For precise tracking, DEXA scans or hydrostatic weighing are required.

Regional Notice: United States

"Federal tax estimates are based on 2024 brackets. Consult a tax professional for official filing."

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