Hip measurement is required for females when using the US Navy Method because it improves the accuracy of the body fat estimate. For males, hip measurement is not normally required. If you are female, measure around the widest part of the hips and glutes while standing relaxed.

The best time to measure is first thing in the morning, after using the bathroom and before eating or drinking. Try to measure under the same conditions each time, as hydration, food intake, training, menstrual cycle changes and bloating can all affect waist and body measurements.

The US Navy Method provides a useful estimate of body fat percentage based on body measurements such as height, neck, waist and, for females, hips. It is not as precise as methods like DEXA scans, hydrostatic weighing or professional skinfold testing, but it is practical, quick and consistent for tracking progress over time. For best results, use the same measuring technique each time.