Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy method. Get lean body mass, fat mass, category, and ideal body fat for your age.
Body Fat, Overweight, and Obesity
Body fat (adipose tissue) serves important bodily function: it stores energy, produces hormones, and provides cushioning and insulation. There are two main types — essential body fat and storage body fat.
Essential fat is necessary for life and reproductive function (typically 2–5% in men and 10–13% in women). Storage fat accumulates under the skin and around organs. While some storage fat is normal, excess amounts — especially visceral fat around the abdomen — can lead to serious health issues.
Potential Health Risks of Excess Body Fat
Excess body fat, particularly visceral fat, is linked to increased risk of cardiovascular disease, type 2 diabetes, certain cancers, insulin resistance, and reduced quality of life. The World Health Organization classifies obesity as one of the leading preventable causes of death worldwide.
How This Calculator Works
U.S. Navy Method (Primary)
Uses neck, waist, and hip circumference measurements. This is one of the most practical and reasonably accurate methods available without specialized equipment.
BMI Method (Secondary)
A quick estimation using age, gender, and BMI. Less accurate than circumference methods but useful for rough comparisons.
Body Fat Categories (American Council on Exercise)
| Category | Women | Men |
|---|---|---|
| Essential Fat | 10–13% | 2–5% |
| Athletes | 14–20% | 6–13% |
| Fitness | 21–24% | 14–17% |
| Average | 25–31% | 18–24% |
| Obese | 32%+ | 25%+ |