What is this calculator?
Calculate body-fat percentage from fat mass measured elsewhere.
What can you use it for?
Use it to understand the numerical relationship between the measurements or dates entered. Calculate body-fat percentage from fat mass measured elsewhere.
How to use it
- Enter total body mass (kg).
- Enter measured fat mass (kg).
- 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 fat mass (kg): 14. The result is 20 % (result).
Assumptions and limits
Fat mass must not exceed total mass. This does not estimate body fat from a tape measure.
Frequently asked questions
What inputs does the Body Fat Calculator need?
Use total body mass (kg), measured fat mass (kg). Read the answer and any additional results below the form. Check the units and the limits of the method.
What assumptions apply to the Body Fat Calculator?
Fat mass must not exceed total mass. This does not estimate body fat from a tape measure.