Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Body Fat Calculator (Navy Method)

Estimates body fat percentage using the U.S. Navy circumference method, which needs only a tape measure — no calipers or scales. It combines neck, waist, height (and hip for women) into a validated equation used by the military for body-composition screening.

Sex

Height (cm)

Neck Circumference (cm)

Waist Circumference (cm)

Hip Circumference (women) (cm)

Health

Waist-to-Hip Ratio Calculator

Divides your waist circumference by your hip circumference to gauge how body fat is distributed — a strong, simple predictor of cardiometabolic risk. A higher ratio indicates more abdominal ("apple-shaped") fat, which carries greater health risk than fat stored on the hips and thighs.

Waist Circumference (cm)

Hip Circumference (cm)

Key differences

	Body Fat Calculator (Navy Method)	Waist-to-Hip Ratio Calculator
Category	Health	Health
Inputs required	5	2
Result	Estimated Body Fat (%)	Waist-to-Hip Ratio
What it does	Estimates body fat percentage using the U.S. Navy circumference method, which needs only a tape measure — no calipers or scales. It combines neck, waist, height (and hip for women) into a validated equation used by the military for body-composition screening.	Divides your waist circumference by your hip circumference to gauge how body fat is distributed — a strong, simple predictor of cardiometabolic risk. A higher ratio indicates more abdominal ("apple-shaped") fat, which carries greater health risk than fat stored on the hips and thighs.