Lean Body Mass Calculator - Calculate Muscle Mass

Lean Body Mass (LBM) includes everything that isn't fat: muscles, bones, organs, and water. Knowing your LBM is crucial for assessing true body composition and tracking muscle building or fat loss accurately.

1. 1

   Enter Basic Data

   Input your gender, age, weight, and height

2. 2

   Enter Measurements

   Input neck, waist, and hip circumference (females)

3. 3

   Get Results

   The tool calculates LBM, fat mass, and percentages

• 1

  Track LBM more than total weight for true progress assessment

• 2

  LBM increasing with stable weight means muscle gain and fat loss

• 3

  Use the same measurement method each time for accurate comparison

• 4

  Measure under same conditions (morning, before eating) for consistency

• Confusing muscle mass with LBM (LBM includes bones and organs too)

• Expecting large rapid LBM increases (max 0.25-0.5 kg monthly for intermediates)

• Ignoring hydration effects on measurements

• Comparing measurements from different methods