Free, runs entirely in your browser — no sign-up, no file upload to a server.
What does Body Fat Calculator do?
It estimates body fat percentage from body measurements (the U.S. Navy method).
How accurate is the result?
It uses standard, widely published formulas, but it's a general estimate, not a medical assessment — for guidance specific to your health, consult a doctor or qualified professional.
Is my data sent anywhere?
Everything runs in your browser — nothing you type or paste is sent to a server.
How do I report a problem or request a feature for this tool?
Use the Contact / Feedback page — select "Body Fat Calculator" as the related tool so we know exactly which tool you mean, then describe the bug or the feature you'd like to see.