Abstract: A belt tension measurement device includes a sleeve with an opening in at least one end, a shaft insertable into the opening where at least a portion of the shaft protrudes from the opening when in a zero position, and a first securing component configured to couple the sleeve to a surface of a power transmission belt and an additional securing component configured to couple the shaft to the surface of the power transmission belt. The shaft includes one or more sets of marks. A set of the one or more sets of marks includes at least one mark. The at least one mark corresponds to at least one shaft position where the power transmission belt is tensioned a pre-determined amount via an extension force generated by an elongation of the power transmission belt. The shaft is moveable between the zero position and the at least one shaft position.