Lean Body Mass (Boer, Men)

This equation estimates a man’s lean body mass, meaning the portion of body weight that is not fat: mainly muscle, organs, bone, and water. It was developed from statistical measurements of body composition and uses height and total mass because those two variables help predict how much of a person’s weight is likely to be lean tissue. It is an approximation, so it is most useful as a quick screening estimate rather than a direct measurement.

Use this when you need a fast estimate of lean body mass for an adult male in fitness, nutrition, or clinical contexts, such as planning protein intake or tracking changes in body composition. It is especially helpful when you do not have access to more direct methods like DEXA, underwater weighing, or bioimpedance.

• Using pounds or inches instead of kilograms and centimetres
• Applying the formula to women, since it is the Boer equation for men
• Treating the result as exact body fat-free mass instead of an estimate