Lean Body Mass Calculator
Calculator ToolsLean mass and body fat estimate from height and weight
Embed this tool on your websiteFree
- Choose how tall the frame should be.
- Press Copy code.
- Paste it into your page, blog, WordPress or Notion HTML block.
The tool runs inside your visitor's browser, nothing is uploaded, and a small "Powered by ToolCloak" line stays under it. The second line (script) is optional: it makes the frame fit the tool's height.
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History
All history →Lean Body Mass Calculator — at a glance
Estimate how much of your weight is lean mass.
How to use it — step by step
Weight, height and sex.
Enter your values
Fill in the fields. Default numbers are shown so you can see how it works.
Press Calculate Lean Mass
The answer appears at once as large result cards.
Copy or share
Copy the result, or share a link that opens with your numbers filled in.
Pro tips
Small things that make the result better.
Quick facts
Frequently Asked Questions
Which formula is used?+
The Boer formula, which uses weight, height and sex.
Is the body fat figure exact?+
No. It is derived from the lean mass estimate and can be off by several percent.
Is my data safe?+
Yes. Everything runs inside your own browser. Your text, files and images are never uploaded to any server.
Is this tool really free?+
Yes — completely free, no signup, no watermark and no usage limit.