How accurate is the US Navy body fat method at home?

The US Navy method estimates body fat from height and neck and waist (plus hip for women) circumferences with just a tape measure. It is practical and free, but individual error can be a few percentage points versus DEXA and depends heavily on measuring technique.

Why do healthy body fat ranges differ between genders?

Women naturally require higher body fat (10-13% essential fat) compared to men (2-5% essential fat) for physiological and hormonal reasons related to overall health.

Free Body Fat Percentage Calculator for Men & Women

Body Fat Calculator

Gender

Height (cm)

Weight (kg)

Waist Circumference (cm)

Measure around navel for men, narrowest point for women

Neck Circumference (cm)

Measure just below the Adam's apple

Global Body Fat Ranges Table

Body Category	For Men	For Women
Essential Fat	2-5%	10-13%
Athletes	6-13%	14-20%
Fitness	14-17%	21-24%
Average	18-24%	25-31%
Obese	25%+	32%+

Action Plan to Reduce Body Fat

Practice strength training to build muscle mass

Increase protein intake to boost metabolism

Replace refined carbs with fiber and vegetables

Improve sleep quality to regulate fat-burning hormones

Consistency in high-intensity cardio (HIIT)

Learning Guide

Guide: How to Measure Accurately

Waist Circumference

Measure around navel for men, narrowest point for women

Neck Circumference

Measure just below the Adam's apple

Hip Circumference

Measure around the widest part of hips

Help Center

Most Common Questions About Body Fat

Q. How accurate is this calculator?

The US Navy method is a practical estimate from body circumferences and can differ from DEXA by a few percentage points. Measure in the morning and the same way each time to track change.

Q. Why do body fat ranges differ between genders?

Women naturally require higher fat levels for hormonal, reproductive, and physiological reasons.