Abstract: Portable scale devices, apparatus and methods for use with stretchers so that emergency medical service (EMS) personal can accurately measure a patient's weight in the field so that proper medication treatment and dosage can be administered. A head plate member can be pivotably attached to a middle plate, and a foot plate member can also be pivotably attached to the middle plate. The head and foot plate members can be inclined to form a V configuration relative the middle plate. A scale can be attached beneath the middle plate so that the pivotable head and foot plate members on the middle member with the scale can be easily inserted between a mattress and a stretcher. The portable scale devices, apparatus and methods can be used in the field as soon as a patient is placed on the stretcher, as well as when the stretcher is being physically moved and handled in the field, and additionally when the stretcher is being placed and/or moved by a vehicle such as an ambulance.