Estimate your lean body mass (LBM) — your total weight minus body fat — using three established formulas: Boer, James, and Hume.
LBM = total body weight minus fat mass. It includes muscle, bone, water, and organs.
| Formula | Description |
|---|---|
| Boer | Most widely cited formula for clinical use |
| James | Derived from a large population study |
| Hume | Based on body density measurements |
| Formula | LBM (kg) | LBM (lb) | % of body |
|---|---|---|---|
| Boer | 56 | 123.5 | 80% |
| James | 56.5 | 124.6 | 80.7% |
| Hume | 52.8 | 116.4 | 75.4% |
| Average | 55.1 | 121.5 | 78.7% |
These formulas use height and weight only. For a more accurate measurement of body composition, consider DEXA scanning or hydrostatic weighing.