What is this calculator?
Calculate fat-free mass from body mass and a measured body-fat percentage.
What can you use it for?
Use it to understand the numerical relationship between the measurements or dates entered. Calculate fat-free mass from body mass and a measured body-fat percentage.
How to use it
- Enter total body mass (kg).
- Enter measured body fat (%).
- Select Calculate (or Generate for random tools).
- Read the answer and any additional results below the form. Check the units and the limits of the method.
Formula and method
The formula uses the units and definitions shown above. Each input is substituted before the arithmetic is evaluated; the calculated output is rounded for display.
Worked example
Total body mass (kg): 70, Measured body fat (%): 20. The result is 56 kg (result).
Assumptions and limits
This is a mathematical estimate, not a diagnosis or a personalized treatment plan. Use appropriate measurements and discuss clinical decisions with a qualified professional.
Frequently asked questions
What inputs does the Lean Body Mass Calculator need?
Use total body mass (kg), measured body fat (%). Read the answer and any additional results below the form. Check the units and the limits of the method.
What assumptions apply to the Lean Body Mass Calculator?
This is a mathematical estimate, not a diagnosis or a personalized treatment plan. Use appropriate measurements and discuss clinical decisions with a qualified professional.