Lean Body Mass Calculator
Calculator ToolsLean mass and body fat estimate from height and weight
FreePrivateInstant
Similar tools you may like
History
All history →Lean Body Mass Calculator — at a glance
Estimate how much of your weight is lean mass.
70 kg
170 cm
Calculate Lean Mass
Lean body mass
How to use it — step by step
Weight, height and sex.
1
Enter your values
Fill in the fields. Default numbers are shown so you can see how it works.
2
Press Calculate Lean Mass
The answer appears at once as large result cards.
3
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.
✦It is an estimate, not a scan.
✦Track the trend over weeks, not days.
✦Body composition scales or scans are more precise.
Quick facts
Freeno signup
Privateruns in your browser
Instantresult in a second
No limituse it as often as you like
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.
More Free Tools
Guides you might like
All guides →BMI CalculatorWhat your BMI can tell you, and what it cannotWaist to Hip Ratio CalculatorWaist-to-hip ratio: how to measure it and what the 0.85 and 0.90 lines meanBMR & Calorie CalculatorBMR and TDEE: how many calories your body burns before you lift a fingerAverage CalculatorThe “average” salary says ₹70,000, but most people there earn ₹32,000. Mean, median and mode explained.