How Long Is the Average Human Arm?

The typical human arm measures 25 inches in length. The typical length for a young man of average height and health is 25 inches, but the length varies.

Just like average human height, typical human arm length varies widely. It is generally acknowledged that the two are related; if a person is taller, they almost certainly have longer arms than a shorter person. Since children tend to have longer arms as they grow in comparison to adults of the same height, this correlation is a little different for them. For instance, assuming the child hasn’t yet reached their maximum height, a 5-foot-tall child will likely have slightly longer arms than a 5-foot-tall adult.