How to use the Body Fat Calculator
Enter the requested values, review any assumptions shown beside the inputs, then run the tool. The main result appears first, followed by supporting values that make the answer easier to understand.
Why this tool is useful
Estimate body fat percentage using the U.S. Navy circumference method. The page is intentionally focused on one task so it stays fast on mobile and easy to revisit.
Important: Health calculations are general estimates and are not medical advice, diagnosis or treatment.