About the Lean Body Mass Calculator
Estimate your lean body mass and fat mass with the Boer formula. This tool is free, works in your browser and needs no sign-up.
How to use the Lean Body Mass Calculator
Choose your sex and enter your weight in kilograms and height in centimetres.
Formula used
Boer: men LBM = 0.407 × weight + 0.267 × height − 19.2. Women LBM = 0.252 × weight + 0.473 × height − 48.3.
Example
With Sex Male, Weight (kg) 70, Height (cm) 175, the calculator shows: Lean body mass = 56.0 kg; Fat mass = 14.0 kg; Body fat = 20.0%.
Frequently asked questions
Is the Lean Body Mass Calculator free to use?
Yes. It is completely free and you can use it as many times as you like.
How accurate is the Lean Body Mass Calculator?
The calculator uses standard formulas, so the maths is exact. Real life results can differ because of fees, taxes, rounding or personal factors, so treat the answer as an estimate.
Do you store the numbers I enter?
No. All calculations run in your browser. The values you type are not sent to our server.
Disclaimer: results are estimates for information only. They are not financial, medical or professional advice.