FFMI Calculator
This FFMI turns the figures for fFMI into a result you can review. Keep the inputs, units and time period consistent.
FFMI
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Lean mass—
This is an estimate for general guidance, not medical advice. For a plan that fits you, talk to a doctor or qualified professional.
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How it works
FFMI = lean mass (kg) ÷ height² (m)How to use the FFMI
Enter the requested values and start with one realistic example. Read the result together with its unit or label, then change one input at a time if you want to compare options.
This is a general estimate and cannot replace advice from a qualified health professional.
Frequently Asked Questions
Is this medical advice?
No. It gives general estimates only. For decisions about your health, speak with a qualified professional.
What information should I enter?
Use the input labels as a guide and enter figures from the same situation, time period and units wherever possible.
Can I use the result as an exact answer?
Treat it as an estimate or check unless the page and the rules that apply to you confirm otherwise. Rounding, fees and personal details can change the final result.