Body Fat Calculator (US Navy Method)

Measure around the neck below the larynx, the waist at the navel and, for women, the hips at the widest point.

Formula

Men: 495 / (1.0324 − 0.19077 log(waist − neck) + 0.15456 log(height)) − 450

Worked example

A man of 178 cm with a 38 cm neck and 85 cm waist has about 16% body fat.

Frequently asked questions

How accurate is the tape method?

It is an estimate, often within 3 to 4 points of lab methods.

How do I measure correctly?

Use a flexible tape, keep it level and do not pull it tight.

What is a healthy body fat level?

It depends on sex and age; ask a health professional for a personal target.

Related calculators

Results are estimates for information only. Check important figures with a professional.