Loading page
Tool workspace
Preparing this tool for you.
Tool workspace
Estimate body fat with the US Navy tape method or BMI formula, then see fat vs lean mass and plan a realistic goal.
About this tool
Estimate body fat with the US Navy tape method or BMI formula, then see fat vs lean mass and plan a realistic goal.
Body Fat Percentage Calculator is a free health tool that runs entirely in your browser — nothing to install, no account to create, and your data never leaves your device. Open the page, add your input, and get a clean, copy-ready result in seconds.
Open Body Fat Percentage Calculator on AltFTool — it loads instantly in your browser.
Enter the values you already know.
Fine-tune the options to match your scenario.
Read the result and use it in your planning or reporting.
Enter what you know and see an accurate result immediately — no formulas or spreadsheets required.
Adjust the inputs to see exactly how each change affects the outcome before you decide.
Take a clear, precise number into your plans, reports, or conversations.
Yes — Body Fat Percentage Calculator is completely free on AltFTool, with no signup, no trial limits, and no hidden costs.
Yes. Body Fat Percentage Calculator runs in your browser, so what you enter or upload stays on your device instead of being sent to a server.
Estimate body fat with the US Navy tape method or BMI formula, then see fat vs lean mass and plan a realistic goal. It's built for quick, everyday health tasks with results you can copy or download straight away.
Yes — Body Fat Percentage Calculator works in any modern browser, on desktop, tablet, and mobile, with the same features everywhere.