Estimate adult body-fat percentage from BMI, age, and sex using a population equation.
Keep a record of the assumptions behind the result and compare nearby scenarios before making a decision.
Estimated body fat % = 1.2 × BMI + 0.23 × age − 10.8 × sex variable − 5.4.
This result reflects only the values and assumptions shown above. It does not automatically include taxes, fees, market changes, local rules, or personal circumstances unless those inputs are explicitly present.
These are demonstration assumptions, not market data or a recommendation. Use Reset example above to reproduce this result, then replace the values for your own scenario.
Example result: 28.489619 % body fat
The example is fixed while your live result above changes. Differences in display rounding do not change the underlying calculation.
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Review the formula and limitations, then verify important decisions with authoritative sources.
Estimated body fat % = 1.2 × BMI + 0.23 × age − 10.8 × sex variable − 5.4.
This is not a direct body-composition measurement and can be inaccurate for athletes, older adults, and many body types.
No. This calculation runs locally in your browser and the values you enter are not sent to a CalcMintly database.