Body Fat Calculator
Calculate body fat percentage using neck, waist and hip measurements with Navy formula.
The Body Fat Calculator below works out your result the moment you type — no sign-up, no cost. A quick, private way to check the numbers that matter to your health. Enter gender, neck circumference (cm), waist circumference (cm) and hip circumference (cm) and the total updates live.
How the body fat calculator works
Just fill in the fields above — gender, neck circumference (cm), waist circumference (cm) and hip circumference (cm) — and the body fat calculator does the maths instantly. Nothing is sent anywhere; the calculation happens right in your browser.
Want this body fat calculator on your own site?
Add it free with RGT Quote Builder — a drag-and-drop WordPress calculator plugin with 100+ ready-made templates and no paywall.
FAQ
Is the body fat calculator free?
Yes — completely free to use, with no account and no limits.
Can I add this body fat calculator to my WordPress site?
Yes. Install the free RGT Quote Builder plugin, pick the Body Fat Calculator template, and drop it onto any page with a shortcode or block.
Can I customise the fields and pricing?
Absolutely — every field, price and formula is editable in the drag-and-drop builder.