Estimate your body fat percentage using the US Navy circumference method. Requires waist, neck, and hip measurements.
A Body Fat Calculator estimates the percentage of your body weight that comes from fat, using measurements like waist, neck, and height through established formulas like the US Navy method.
The tool uses circumference measurements and applies a logarithmic formula specific to your gender to estimate body fat percentage without needing specialized equipment.
Enter your gender, height, and weight. Enter your waist, neck, and for women hip circumference measurements. Click Calculate to see your estimated body fat percentage and category.
Example 1: A man with a 34 inch waist and 16 inch neck at 70 inches tall might show a body fat percentage in the fitness category, around 15 to 18 percent.
Example 2: Lower waist measurements relative to height and neck generally indicate a lower estimated body fat percentage.
Tracking body composition changes during a fitness program. Setting realistic body fat reduction goals. Comparing fitness progress beyond just weight on a scale. Supporting health assessments alongside BMI.
How accurate are tape measurement based body fat estimates. They provide a reasonable estimate but are less precise than methods like DEXA scans or hydrostatic weighing.
What is a healthy body fat percentage. Generally 10 to 20 percent for men and 18 to 28 percent for women, though ranges vary by age and fitness level.
Why does the formula differ for men and women. Body fat distribution patterns differ by gender, requiring different measurement inputs and formulas.
Can body fat percentage be too low. Yes, excessively low body fat can negatively affect hormone function and overall health.
Does muscle mass affect this estimate. Yes, since the formula relies on circumference measurements rather than directly measuring fat tissue.