Body Fat Calculator
Estimate your body fat percentage using the US Navy method. Enter your measurements below.
FAQ
The US Navy circumference method has an error margin of about 3-4% compared to DEXA scans. It is more accurate than BMI alone but less precise than hydrostatic weighing or DEXA.
For men: 10-20% is healthy, 6-13% is athletic, under 5% is essential fat only. For women: 18-28% is healthy, 14-20% is athletic, under 13% is essential fat only.
You need your height, waist circumference, and neck circumference. Women also need hip circumference. Measure at the widest/narrowest points as instructed for accuracy.
About this test
This body fat calculator uses the US Navy circumference method to estimate your body fat percentage. It provides a quick assessment using simple body measurements.
How It Works
Enter your height, waist circumference, and neck circumference (plus hip circumference for women). The calculator applies the US Navy formula to estimate your body fat percentage and compare it to healthy ranges.
The Navy Method
Developed by Hodgdon and Beckett at the Naval Health Research Center, this method correlates body circumference measurements with body fat percentage. It is used for military fitness assessments worldwide.
Important Notes
- This is an estimate, not a medical measurement
- Measure in the morning before eating for consistency
- Use a flexible tape measure against bare skin
- Consult a healthcare professional for clinical assessments