Body Fat Calculator (US Navy Method)

Estimate your body fat percentage using circumference measurements.

Units:

Gender:

Height (cm):

Neck Circumference (cm):

Waist Circumference (cm): (Measure at navel level for men, narrowest point for women)

Hip Circumference (cm): (Measure at widest point)

How to Use (US Navy Method)

Select your units (Metric/Imperial) and gender.
Measure and enter your height.
Measure and enter your neck circumference (at Adam's apple level, looking straight).
Measure and enter your waist circumference (horizontal level around navel for men, minimum circumference for women).
If Female: Measure and enter hip circumference (at largest horizontal measure).
Optional: Enter your weight to calculate fat mass and lean mass.
Click "Calculate Body Fat %".

Use a flexible measuring tape. Measurements should be snug but not tight.

US Navy Body Fat Formulas

Men:
%Fat = 86.010 * log10(Waist - Neck) - 70.041 * log10(Height) + 36.76

Women:
%Fat = 163.205 * log10(Waist + Hip - Neck) - 97.684 * log10(Height) - 78.387

(All measurements in cm for these specific constants)

Disclaimer: This method provides an *estimation* of body fat. Accuracy can vary based on measurement precision and individual body composition. It's generally less accurate than methods like DEXA scans.

Body Fat Calculator (US Navy Method)

Body Fat Estimation:

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