Body Fat Calculator
Estimate your body fat percentage using the US Navy circumference method for men and women.
Enter values and click Calculate
Assess Body Fat for Health & Fitness
The Body Fat % Calculator estimates your body fat percentage and category based on height, neck, waist, and hip measurements (for women).
Formula
Body Fat % = US Navy Circumference Method
How to Use?
- Select biological sex.
- Enter height, neck, waist, and (for women) hip measurements.
- View estimated body fat % and category.
Worked Examples
Example 1
Given:inputs
biologicalSex:male
height:180
waist:85
neck:40
Result:calculated
bodyFat:15.2
category:Fitness
Body Fat & Health
Body fat percentage is a key indicator of health and fitness. The US Navy method estimates body fat using circumference measurements for men and women.
Category Interpretation
Categories: Essential fat, Athletes, Fitness, Average, Obese. Helps evaluate fitness and adjust lifestyle accordingly.
Table: Body Fat Categories
| Category | Men (% fat) | Women (% fat) |
|---|---|---|
| Essential fat | 2–5 | 10–13 |
| Athletes | 6–13 | 14–20 |
| Fitness | 14–17 | 21–24 |
| Average | 18–24 | 25–31 |
| Obese | ≥25 | ≥32 |
FAQs
Why calculate body fat %?
It provides a more accurate measure of fitness than weight alone.
How often should I check?
Monthly or quarterly tracking is recommended to monitor trends.