Army Body Fat Calculator - US Army Tape Method

Method	US Army circumference formula
Inputs	Neck, waist, hip, height
Units	Metric or imperial
Output	Body fat % + lean mass

What is Army Body Fat Calculator?

The US Army uses a circumference-based equation to estimate body fat when a service member exceeds the weight-for-height screen. It measures the neck and waist for men, and the neck, waist and hip for women, and combines them with height in a logarithmic formula. This calculator applies the same equation so you can reproduce the estimate at home. As with all tape methods, technique matters: measure at the standard sites, keep the tape horizontal and snug, and take each reading more than once. The result is an estimate, not the official assessment, and it carries the same 3–4 percentage-point accuracy range as other circumference methods.

Common Uses for Army Body Fat Calculator

Reproduce the Army tape-method estimate at home
Track body composition against a familiar standard
Compare the Army and Navy equations side by side

Frequently Asked Questions

How does the Army measure body fat?

Circumferences of the neck and waist for men, and neck, waist and hip for women, entered into a logarithmic equation with height. The Army uses the result when weight exceeds the screening table.

Is the Army method accurate?

It is a validated field estimate accurate to roughly 3–4 percentage points. It is not a substitute for DEXA, but it is consistent and repeatable with careful measuring.

Does the Army method differ from the Navy method?

Both are circumference equations and give similar results. The coefficients differ slightly, so the two estimates can differ by a percentage point or two on the same measurements.