Which measurement is longer: length of the forearm or length of the arm?

The length of the arm, which is defined from the shoulder to the elbow, is generally longer than the length of the forearm, which extends from the elbow to the wrist. In the human anatomy, the arm consists of the upper arm (humerus) and the forearm (radius and ulna).

Typically, the upper arm is substantially longer than the forearm. Thus, when comparing the total lengths, the arm encompasses both the upper arm and the forearm, resulting in an overall greater length than just the forearm itself.

While individual variations can impact specific measurements, generally, the anatomical structure indicates that the length of the arm will always exceed the length of the forearm for the vast majority of individuals. Therefore, the arm is indeed the longer measurement when considering these two segments.