Body Fat Percentage Calculator

What is Body Fat Percentage Calculator?

Body fat percentage provides a significantly more accurate picture of body composition and cardiovascular health than total scale weight alone. Our Body Fat Calculator estimates your body fat percentage, total fat mass, and lean muscle mass using the official US Navy Department of Defense circumference equations with standard tape measurements in client-side memory.

Designed for accuracy, speed, and privacy, this tool runs entirely on your local device with zero network latency.

How to Use the Body Fat Percentage Calculator

1. 1
   Select your Biological Sex and Measurement Units (Metric centimeters or Imperial inches).
2. 2
   Enter your Age, Height, Weight, Neck Circumference, and Waist Circumference (at narrowest point or navel).
3. 3
   For female measurements, also enter your Hip Circumference measured at the widest horizontal point.
4. 4
   Review your calculated Body Fat Percentage, Fat Mass, Lean Mass, and fitness category rating per American Council on Exercise (ACE) standards.

Formula & Calculation Logic

Implements the standardized US Navy anthropometric circumference equations developed by Hodgdon and Beckett (Naval Health Research Center). Logarithmic transformations estimate body density and fat mass.