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Calculate lean body mass (LBM) and body fat mass percentage.
Free online health tool
Calculate lean body mass and fat mass using Boer and James formulas.
Enter your input parameters or select your files. Our lean body mass calculator processes your data instantly using standard browser algorithms. All operations run 100% locally on your device with no server uploads, no data storage, and no account registration required.
Calculate lean body mass (LBM) and body fat mass percentage. Yuitility keeps the workflow fast and focused, so you can complete the job without creating an account.
Frequently asked questions about calculation formulas, privacy, and usage.
The Lean Body Mass Calculator processes your inputs directly in your web browser to perform fast calculations, transformations, or data formatting without external tools.
Yes. Yuitility provides the Lean Body Mass Calculator 100% free with no account creation, no usage caps, and no subscription fees.
No. All file processing, image conversion, and data math execute locally on your device. Your data never leaves your browser window.
Yes. Once the page is loaded, the client-side JavaScript execution code remains active in memory, allowing offline use without an active internet connection.
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