Estimate body fat percentage using a waist, neck, height, and weight based screening formula.
Enter your gender and body measurements in metric units.
Enter your details to estimate body fat percentage, category, fat mass, and lean mass.
Compare your estimate with category thresholds and view body measurement inputs.
This calculator estimates body fat percentage from height, neck, waist, gender, and weight using a U.S. Navy style waist and neck screening formula.
It is a quick wellness estimate, not a medical diagnosis. Measurements, hydration, athletic build, age, and health conditions can affect interpretation.
The calculation runs directly in your browser without WordPress REST gateways, n8n webhooks, or external workflow calls.
Estimate body fat percentage, category, fat mass, and lean mass using waist, neck, height, and weight inputs.
This health calculators page is designed for quick checks, planning, and everyday decision support without forcing users through a heavy workflow.
Enter the required values in the calculator above, review any optional settings, and run the calculation. Check the result summary and reset the form when you want to try a different scenario.
For important decisions, compare the output with your own records and professional guidance where needed.
Use the visible input fields in the calculator above. The result is calculated from the entered values using the standard method for this tool.
Example: enter realistic sample values in the required fields, run the calculator, and review the result summary shown on the page.
Use quick health screening calculators for everyday wellness checks and simple body metric estimates.
Last updated: May 10, 2026
Visible answers for users before they rely on a calculator result.
Yes. The Body Fat Calculator is free to use in your browser.
No. Treat calculator output as an estimate and verify important finance, medical, tax, legal, or compliance decisions with a qualified professional.
Yes. The page is built to work on mobile, tablet, and desktop screens.