Utility model patent for cellular telephones such as the one shown in Figure 1, having a keypad 9 and a display that make it possible to select, access and view utility functions, having additional hardware and/or software 7 and a sensor 3 that emits a laser beam or electromagnetic wave or ultrasound or infrared or any other type of signal to enable the instant measurement of distances, areas and volumes. These distances, areas and volumes appear on the display 6 when the tape measure function of the cellular telephone is accessed and run. The cellular telephone with tape measure function is useful both for ordinary users and civil engineering professionals, engineers, surveyors, master builders, mason bricklayers, real estate professionals, brokers, auto industry professionals, mechanics, body shop professionals, decorators, carpenters, landscapers, scenery and stage designers and the like.