Health & fitness
Back to all calculators
Health & fitness
FFMI calculator
Calculate fat-free mass index from weight, body fat and height.
Your result
Complete the fields and calculate.
Example
FFMI calculator
Lean mass divided by height squared.
FAQ
Frequently asked questions
How accurate is the result?+
The calculator uses the stated formula and only rounds the display. Accuracy depends on your inputs.
Is this calculator really free?+
Yes. Use it as often as you like without an account or registration.
Are my entries stored?+
The calculation runs directly in your browser. Calculator values are stored locally only when you explicitly add a result to “My results”. Favourites and history also remain locally on your device.