CalcWise

Body Fat Calculator

Calculate your body fat percentage using the US Navy method.

Measurements

Your Results

Body Fat Percentage
9.0%
Athletes
Fat Mass
6.8 kg
Lean Mass
68.2 kg

Reference Ranges

Category
Men
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%+

Understanding Body Fat Percentage

Body fat percentage is a measure of fitness level, since it is the only body measurement which directly calculates a person's relative body composition without regard to height or weight. The widely used body mass index (BMI) provides a measure that allows for the comparison of the adiposity of individuals of different heights and weights.

The US Navy Method

The US Navy method uses a set of formulas developed by the Department of Defense to estimate body fat percentage. It requires only a tape measure and is considered one of the most accurate methods available outside of clinical settings. The formula takes into account your height, neck circumference, and waist circumference (plus hip circumference for women).

How to Measure Accurately

  • Neck: Measure below the larynx (Adam's apple), keeping the tape sloping slightly downward to the front.
  • Waist: For men, measure at navel level. For women, measure at the narrowest point of the abdomen.
  • Hips (Women only): Measure at the widest point of the hips/buttocks.
  • Height: Measure without shoes, standing straight against a wall.

Frequently Asked Questions

What is a healthy body fat percentage?

A healthy body fat percentage varies by gender and age. Generally, for men, 10-20% is considered healthy, while for women, 20-30% is considered healthy. Essential fat is 2-5% for men and 10-13% for women.

How accurate is the US Navy method?

The US Navy method is generally accurate within 3-4% of your actual body fat percentage. While not as precise as DEXA scans or hydrostatic weighing, it is highly reliable for tracking progress over time when measurements are taken consistently.

Why do women need a hip measurement?

Women naturally store more fat in the hip and thigh areas due to hormonal differences and reproductive needs. Including the hip measurement provides a more accurate assessment of a woman's overall body fat distribution.