Meet the FFMI Calculator
Enter your weight, height and body fat percentage to get your lean mass, fat mass, FFMI and height-adjusted (normalized) FFMI with a rating from below.
- Free to use
- No signup
- Nothing to install
- Runs in your browser
Illustration. Open the tool for the real thing.
See it in action
Sample input: Weight (kg) = 80; Height (cm) = 178; Body fat % = 15
What is the FFMI Calculator?
Enter your weight, height and body fat percentage to get your lean mass, fat mass, FFMI and height-adjusted (normalized) FFMI with a rating from below average to superior.
Useful to see how muscular you are relative to height, independent of fat.
2 steps to your result
Open the tool and follow along. Nothing to install.
What you get
kg.
Height adjusted.
For men and women.
AZRS tools are free to open and use.
It opens in your browser, so there is nothing to download.
Used for
Pick one to see how it fits.
How it compares
A plain look at this tool next to the usual alternative.
| This fitness tool | Desktop software | |
|---|---|---|
| Install | Nothing to install | Usually an app or program to install |
| Account | No signup | Depends on the product |
| Cost | Free to use | Free or paid, depends on the product |
| Where it runs | In your browser tab | On your computer |
Questions people ask
What is a natural limit?
Most natural lifters top out around 22 to 25 FFMI (men).
Is it free and private?
Yes. Lean mass, fat mass and FFMI with a muscularity rating. It is free with no signup, runs in your browser, and anything saved stays on your own device. Includes Lean and fat mass; FFMI and normalized FFMI; Rating.
Does FFMI say how strong I am?
No. It describes lean mass relative to height, not strength, skill or health.
Is a higher FFMI always better?
It shows more lean mass for your height, but it does not measure strength, health or skill.
How do I use the FFMI Calculator?
1. Enter weight, height and body fat %. 2. Read your FFMI and rating.
More free tools
Related to the FFMI Calculator.
Try the FFMI Calculator now
Lean mass, fat mass and FFMI with a muscularity rating. Free to use.
Try it free