Body Fat Percentage Calculator
Estimate adult body fat percentage using the US Navy circumference method. Enter measurements in centimetres, then click Calculate.
Body Fat Percentage Calculation Results
Waiting for calculation
Enter your measurements and click Calculate Body Fat Percentage.
How the calculator works
The US Navy method uses logarithmic equations based on height, neck and waist measurements, plus hip circumference for the female equation. Measurements are converted from centimetres to inches before calculation. The male waist measurement is taken at the navel, while the female waist measurement is taken at the narrowest point.
Results are approximate and can vary with measurement technique and body proportions. This tool is for non-pregnant adults. It does not measure body composition directly and is not intended to diagnose health conditions.
Frequently Asked Questions
What does body fat percentage mean?
It estimates the share of total body weight made up of fat tissue.
How is body fat percentage calculated here?
The calculator uses the US Navy circumference equations with height, neck, waist and, for the female equation, hip measurements.
Where should I measure my waist?
For the male equation, measure at the navel. For the female equation, measure at the narrowest waist point. Keep the tape level and follow consistent technique.
Where should I measure my neck and hips?
Measure the neck just below the larynx. For the female equation, measure hips at the widest point.
Is this as accurate as a clinical body composition test?
No. Tape measurements are estimates and can differ from clinical measurements such as DXA.
Can I use centimetres?
Yes. Enter all circumferences and height in centimetres. The calculator converts internally to inches for the equation.
Is this suitable for children or pregnant people?
No. This educational tool is intended for non-pregnant adults and may not suit certain populations.