Body Fat Calculator
Calculate your body fat percentage using the US Navy method.
Estimated Body Fat Percentage 16.4%Fitness Range
About Body Fat Calculator
Estimating body composition helps track fitness progress. RealOnlineTools offers a body fat estimator based on the US Navy Circumference Method.
Input your height and measurements, and our tool calculates your fat percentage and category instantly, keeping your personal metrics secure.
Frequently Asked Questions
The US Navy method uses height and circumferences of neck, waist (and hips for females) to calculate body density, which is converted to fat percentage using the Siri equation.
Body fat percentage measures the actual ratio of adipose tissue, while BMI is a general height-to-weight ratio.
It provides a reliable estimate based on the Navy formula. Since the calculator runs client-side, your physical measurements are processed locally.