Lean Body Mass Calculator
Calculate your lean body mass — total weight minus body fat.
Inputs explained
- Body Weight (kg) — Your total body weight in kilograms.
- Body Fat Percent — Your body-fat percentage. Example: 20.
How to use it
- Fill in the fields above — each input has a hint describing exactly what to enter
- Press Calculate to get your result instantly, right on this page
- Copy the result, save the tool to favorites, or share and embed it anywhere
Understanding the result
Example: At 80 kg and 20% body fat, lean body mass is 64 kg.
Frequently asked questions
Is the Lean Body Mass Calculator free to use? Yes — it is completely free, with no sign-up, no download and no usage limits. You can use it as often as you need.
Is my data private? Yes. The calculation runs entirely in your browser — the values you enter are never sent to our servers, stored or shared with anyone.
What information do I need? Just the following: Body Weight (kg), Body Fat Percent. Each field includes a hint explaining exactly what to enter.
Can I use it on my phone? Yes — the tool is fully responsive and works on any device, and the same calculator is available in the EasyWorkCalcs mobile app.
Privacy
Everything you enter into the Lean Body Mass Calculator is processed entirely in your browser. Nothing is uploaded, stored or shared — your data stays on your device.