Compare calculators

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

Army Body Fat Calculator

Estimate body-fat percentage using the U.S. Army circumference-based method (AR 600-9). Uses neck, waist, height for men, and neck, waist, hips, height for women.

Sex

Height (in)

Neck circumference (in)

Waist circumference (at navel) (in)

Hips circumference (women only) (in)

Fill in the required fields to see your result.

Medicine

BMI Calculator

Instantly compute your Body Mass Index from weight and height to screen which WHO weight category you fall in. Returns a single kg/m² number classified as underweight, normal, overweight, or obese.

Weight (kg)

Height (cm)

Fill in the required fields to see your result.

Key differences

	Army Body Fat Calculator	BMI Calculator
Category	Fitness	Medicine
Inputs required	5	2
Result	Body-fat percentage (%)	Your BMI
What it does	Estimate body-fat percentage using the U.S. Army circumference-based method (AR 600-9). Uses neck, waist, height for men, and neck, waist, hips, height for women.	Instantly compute your Body Mass Index from weight and height to screen which WHO weight category you fall in. Returns a single kg/m² number classified as underweight, normal, overweight, or obese.