💪 Body Fat Percentage Calculator for Women — US Navy Formula
Calculate body fat percentage for women using neck, waist, and hip measurements for women. Uses the medically-validated US Navy logarithm formula (1–3% accuracy vs DEXA scan). Also shows BMI, Lean Body Mass (LBM), and BMR.
Body Fat Classification (Women)
Body Fat Calculator
Frequently Asked Questions
How accurate is the US Navy body fat formula for women?
The US Navy formula has been validated against DEXA scans with ~1–3% margin of error. It's more practical than calipers (no skill needed) and more accessible than hydrostatic weighing. It is the standard method used by the US military for fitness assessments.
What measurements do I need for women?
Women need 4 measurements: height, neck circumference, waist circumference (at narrowest point), and hip circumference (at widest point). Measure in centimeters or inches consistently.
What is Lean Body Mass (LBM)?
LBM is your total body weight minus fat mass: LBM = Weight × (1 − body fat%). It includes muscles, bones, organs, and water. Tracking LBM is more meaningful than scale weight — an increase in LBM indicates muscle gain even if total weight stays the same.