Body Fat Calculator for Women
Calculate female body fat percentage using the US Navy tape measure method. Optimized for gynoid fat distribution with hormonal context and lean mass analysis.
About
Accurate body composition tracking requires more than a simple bathroom scale. Weight fluctuates daily due to water retention, hormonal cycles, and sodium intake. This tool utilizes the US Navy circumference method to isolate adipose tissue from lean body mass. The algorithm accounts for the natural gynoid fat distribution where tissue accumulates around the hips and thighs. Measurements should be taken at the same time during the menstrual cycle to minimize data noise from bloating. This method provides a reliable baseline for monitoring fat loss without the variance of bioimpedance scales.
Formulas
The calculation relies on the relationship between height and body circumferences. The formula assumes a specific density of fat versus muscle.
Lean Body Mass (LBM) is derived by subtracting fat mass from total weight.
Reference Data
| Category | Range (%) | Description |
|---|---|---|
| Essential Fat | 10-13% | Minimal physiological requirement |
| Athletes | 14-20% | High performance conditioning |
| Fitness | 21-24% | Healthy and active |
| Average | 25-31% | General population norm |
| Obese | ≥32% | Increased health risk |
| Age 20-39 Ideal | 21-33% | Age-adjusted benchmark |
| Age 40-59 Ideal | 23-34% | Age-adjusted benchmark |
| Age 60-79 Ideal | 24-36% | Age-adjusted benchmark |