Step-by-step instructions
- Enter or select BMI.
- Enter or select Age.
- Enter or select Sex.
- Tap Calculate.
- Review the result shown directly below the calculator.
Body Fat Estimate Calculator
Estimate body fat percentage using BMI, age and sex.
How to use the Body Fat Estimate Calculator
Estimate body fat percentage using BMI, age and sex.
What the inputs mean
- BMI
- Enter the value requested by this field label.
- Age
- Enter the value requested by this field label.
- Sex
- Choose the option that best matches your calculation.
Formula or calculation method
The calculator applies the standard mathematical relationship for the labeled inputs and returns the computed result automatically.
Example
Try entering realistic values for BMI and Age, then tap Calculate to see how the result changes.
How to understand the result
Use the result as an estimate based on the values you entered. For planning decisions, double-check that the input units and assumptions match your real situation.
Tip: Keep all values in compatible units and use values from the same time period when the calculator compares two amounts.