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Lean Body Mass Calculator

Health
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Calculates the weight of the body minus fat (muscles, bones, organs, water).

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Weight and Body Fat Percentage in the units shown.

Step 2

Read Fat Mass and Lean Body Mass in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Athlete

Weight: 180 pounds; Body Fat Percentage: 10 %

Fat Mass: 18 pounds; Lean Body Mass: 162 pounds

Healthy Male

Weight: 175 pounds; Body Fat Percentage: 15 %

Fat Mass: 26.25 pounds; Lean Body Mass: 148.75 pounds

Healthy Female

Weight: 140 pounds; Body Fat Percentage: 25 %

Fat Mass: 35 pounds; Lean Body Mass: 105 pounds

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Important

Use the result as an estimate and confirm any medical decisions with a qualified professional.