Lean Body Mass Calculator: How to Use It, Tips and FAQs

Published 6 November 2026 by Kloora Tools

Quick answer: Lean Body Mass Calculator: Estimate lean body mass and fat mass from height, weight and sex with the Boer formula. Everything runs in your browser, so nothing you enter is uploaded or stored.

Looking for a quick, free way to use a lean body mass calculator? Estimate lean body mass and fat mass from height, weight and sex with the Boer formula.

What the Lean Body Mass Calculator does

Estimate lean body mass and fat mass from height, weight and sex with the Boer formula. Free, instant and private. No signup, no download. It runs in your browser, so what you type stays on your device.

Which formula is used? The Boer formula: men 0.407 x weight + 0.267 x height - 19.2, women 0.252 x weight + 0.473 x height - 48.3 (kg and cm).

How to use it, step by step

1. Enter your values in the fields.
2. The results update instantly as you type.
3. Note or copy the numbers you need.

Open the Lean Body Mass Calculator in a new tab, follow these steps and keep this page beside it.

Questions this tool answers

Where can I use a free lbm calculator?

Use the Lean Body Mass Calculator. Estimate lean body mass and fat mass from height, weight and sex with the Boer formula.

How to calculate lean body mass?

The Lean Body Mass Calculator covers this. Enter your details, read the result and compare it with your own case. It is an estimate. A DEXA scan or skinfold test is more accurate.

Where can I use a free fat free mass calculator?

The Lean Body Mass Calculator covers this. Enter your details, read the result and compare it with your own case. Yes. It is free, needs no signup and works on any device.

Who it helps

The Lean Body Mass Calculator is made for students, shop owners, job holders and anyone who needs a quick number without opening a spreadsheet. It works on a phone, a tablet and a computer.

What you get

• Instant results
• Free, no signup
• Runs in your browser, nothing is uploaded
• Works on phone and desktop

Tips for good results

• Check that each number is in the unit the field asks for before you read the answer.
• Round only at the end. Rounding inside the steps can shift the final figure.
• Treat the result as an estimate for planning. For a legal, tax or medical decision, confirm it with a professional or the official source.

Try it now

Open the free Lean Body Mass Calculator. If you need something related, browse the Kloora Tools home page or the tools listed at the end of this guide.

Frequently asked questions

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