How to use the body fat percentage calculator
Estimate body fat percentage from waist and neck measurements. Enter height, waist, neck in the fields above; the body fat (male) is computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- h — Height (cm)
- w — Waist (cm)
- n — Neck (cm)
Worked example
With height = 178 cm, waist = 85 cm, neck = 38 cm, the calculator gives body fat (male) ≈ 16.43601 %.
Frequently asked questions
What is the formula for the body fat percentage calculation?
Body fat (male) (%) = 495 / (1.0324-0.19077 × log10(w-n)+0.15456 × log10(h))-450. Here h is height (cm), w is waist (cm), n is neck (cm).
What inputs do I need for the body fat percentage calculator (navy method) calculator?
You need height in cm, waist in cm, neck in cm. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.