What is the Lean Body Mass Calculator?
Estimate lean body mass with the Boer formula.
Enter weight, height and sex and the Lean Body Mass Calculator returns lean body mass and estimated body fat. Results update as you type, and nothing you enter leaves your device.
How it is calculated
Boer: men 0.407 × weight + 0.267 × height − 19.2
women 0.252 × weight + 0.473 × height − 48.3
How to use it
- Enter weight in kg.
- Enter height in cm.
- Choose sex.
- Read lean body mass in the results panel. It updates as you type.
- Change any value to compare scenarios, or use Share to send the result as a link.
Worked example
Common questions
What formula does the Lean Body Mass Calculator use?
It uses: Boer: men 0.407 × weight + 0.267 × height − 19.2; women 0.252 × weight + 0.473 × height − 48.3.
What do I need to use the Lean Body Mass Calculator?
You need weight, height and sex. Sensible starting values are filled in so you can see how it works straight away.
Is the Lean Body Mass Calculator free, and is my data stored?
It is free with no sign-up. The calculation runs in your browser, so the values you enter are not sent to or stored on our server.