Compare calculators

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

Body Fat Calculator (Navy Method)

Estimate your body fat percentage using the US Navy tape-measure method with only a few simple circumference measurements. No calipers or lab equipment required — results are suitable for health and fitness tracking.

Gender

Waist Circumference (cm)

Neck Circumference (cm)

Height (cm)

Hip Circumference (Women Only) (cm)

Fill in the required fields to see your result.

Fitness

BMI & Body Surface Area Calculator

Calculates your Body Mass Index using your height and weight. Use it to quickly screen for your weight category.

Height (cm)

Weight (kg)

Fill in the required fields to see your result.

Key differences

	Body Fat Calculator (Navy Method)	BMI & Body Surface Area Calculator
Category	Fitness	Fitness
Inputs required	5	2
Result	Body Fat Percentage (%)	Body Mass Index (kg/m²)
What it does	Estimate your body fat percentage using the US Navy tape-measure method with only a few simple circumference measurements. No calipers or lab equipment required — results are suitable for health and fitness tracking.	Calculates your Body Mass Index using your height and weight. Use it to quickly screen for your weight category.