Body Fat Calculator

Estimate body-fat percentage from circumference measurements using the Navy method.

Body Fat Calculator helps you u.S. Navy circumference method for an estimated body-fat percentage. Enter height, waist, neck, and hips, review the breakdown, and use the guidance below to understand what the number means — and what it does not. What the Body fat calculator does Body Fat Calculator is built for body measurements, calories, and everyday health math. U.S. Navy circumference method for an estimated body-fat percentage. You enter height, waist, neck, and hips, then Simple Calculators computes the result instantly. These tools use widely published formulas. They are educational screens, not a diagnosis. How the math works Navy method uses logarithms of waist, neck, height, and (for females) hips. Output is a percentage of body weight. The formula: Body fat = 495 ÷ (1.0324 − 0.19077 × log₁₀(waist − neck) + 0.15456 × log₁₀(height)) − 450. Female formula also includes hips. Height, waist, neck, and hips in centimeters.