Body Fat Calculator
Professional grade body composition analysis
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Enter your body measurements to calculate your body fat percentage and health profile.
Understanding Body Fat Percentage
Body fat percentage is the total mass of fat divided by total body mass, multiplied by 100. Unlike BMI, it distinguishes between muscle mass and fat mass, providing a more accurate picture of health.
Why Measure Body Fat?
Measuring body fat is a better indicator of fitness than weight alone. Two people with the same weight can have completely different health profiles based on their body composition. Low body fat is essential for athletes, while maintaining a healthy range is crucial for preventing metabolic diseases.
The Navy Method Accuracy
The U.S. Navy Method is one of the most accurate ways to estimate body fat without expensive clinical equipment. By measuring specific body circumferences (neck, waist, and hips), the formula accounts for where your body stores fat, providing a remarkably reliable estimation for most adults.
Health Implications of Body Fat
Low Fat
Required for peak athletic performance but can affect hormone production if too low.
Healthy Range
Optimal for cardiovascular health, energy levels, and metabolic function.
High Fat
Increased risk of Type 2 diabetes, heart disease, and hypertension.
How the Calculation Works
We use two scientifically recognized methods to provide you with the most accurate body fat estimation possible.
U.S. Navy Formula
Developed by the U.S. Navy, this formula uses your height and circumference measurements to estimate fat density. It is more accurate than BMI because it accounts for muscle distribution.
For Men (cm):
495 / (1.0324 - 0.19077 * log10(waist - neck) + 0.15456 * log10(height)) - 450
For Women (cm):
495 / (1.29579 - 0.35004 * log10(waist + hip - neck) + 0.221 * log10(height)) - 450
BMI-Based Formula
This method uses the Deurenberg formula to estimate body fat based on your Body Mass Index (BMI). It provides a quick estimation but may be less accurate for very muscular individuals.
For Adults:
(1.20 * BMI) + (0.23 * Age) - (10.8 * sex) - 5.4
*sex is 1 for male, 0 for female
Tip: For the most accurate result, take your measurements in the morning before eating, and ensure the measuring tape is snug but not compressing the skin.