Estimates your lean body mass (LBM), which includes the weight of your muscles, bones, organs, and water—essentially everything except body fat. This tool provides an accurate assessment of your body composition using the Boer formula, one of the most precise methods. You can easily switch between Metric (kg, cm) and Imperial (lbs, in) units. The calculator presents a clear breakdown of your Lean Body Mass, Body Fat Mass, and Body Fat Percentage, complemented by an intuitive donut chart for a quick visual summary. Your inputs are automatically saved in your browser for convenience and complete privacy.