Body fat calculator
Estimate body fat using the measurements requested by the calculator. Review the method and limitations before interpreting the result.
Body Fat Percentage Calculator
Enter consistent measurements
Select US or metric units and enter the requested measurements. Follow the labels for height, weight, neck, waist, and hip circumference. Use a consistent measuring method when comparing entries over time. Select Calculate to display the estimate or Clear to reset the form.
What this page estimates
The result is calculated from measurements and a formula. It is not a direct measurement of body fat or a clinical body-composition assessment. Small changes in tape position or entered units can change the result.
Read every label cautiously
The display includes a percentage, category, and derived values. Labels such as “ideal” or “body fat to lose” are outputs of this model, not a personalized medical recommendation. An estimate cannot determine what weight change, if any, is appropriate for you.
Check before comparing results
Confirm that both results use the same units, measurements, and method. A result from another device or technique may not be directly comparable. Keep the original measurements if you want to discuss them with a clinician. Use qualified medical advice for health decisions rather than changing diet, exercise, or treatment based on this page alone.