The body three-dimensional meter (mtc) is a diagnostic tool designed ergonomically to assess the normal and pathological state of the human body. This instrument allows quantifying changes in body morphology throughout life and adopt specific measures to diagnose and determine the alterations or deformities that people present at a structural level. The scope of clinical application of the invention will be aimed at the medical industry, and more specifically the podiatric, dental, physiotherapeutic, prosthetic, medical, health sectors, since there are instruments of very diverse characteristics depending on the benefits provided for each case, but that lack the possibility of measuring in different dimensions the human body, to calculate at a general level the volume, the diameter, the perimeter, among others, and in particular the measurement of the anatomical segments, among many other utilities that accompanies this instrument. (Machine-translation by Google Translate, not legally binding)