How do I measure my waist correctly?
For men, measure horizontally around the navel. For women, measure the narrowest point of the abdomen, usually just above the belly button.
Tool Categories
Free Body Fat Calculator | U.S. Navy Method | 1ClickTools
Estimate your body fat percentage, lean mass, and fat mass using the highly-accurate U.S. Navy tape measure method. Free online health tool.
Frequently Asked Questions
How do I measure my neck?
Measure the circumference of your neck just below the larynx (Adam's apple), keeping the tape horizontal and relatively flat against the skin.
Why do women need a hip measurement?
Biologically, women tend to store more body fat in the hips and thighs compared to men (who store it in the abdomen). The Navy formula accounts for this physiological difference.
How accurate is this body fat calculator tool?
All processing runs entirely in your browser using verified algorithms. Results are computed with full double-precision — no server-side rounding or data transmission occurs.
How does 1ClickTools ensure my privacy and file security?
Privacy is our highest priority. All computations, data parsing, and file conversions take place locally inside your web browser's client-side memory using modern JavaScript and HTML5 APIs. Your data is never uploaded, stored, or transmitted to any external remote server.