Abstract: A folding dumbell and barbell device having an elongated far with weights mounted on opposing ends of the elongated bar. Each of the weights contain a pivoting mechanism within the body of the weights and a slot in the inner side of the weights which will receive the elongated bar when the weights are pivoted or folded to the folding position. The pivoting mechanism attaches to the end of the elongated bar in the slot, thereby providing a pivoting point inside the weights. Each of the weights also includes a locking mechanism which locks the weights in the open position while exercising. To fold the dumbell or barbell, the locking mechanism is disengaged, the weights pivot with the pivot mechanism and are folded over on the bar and receive the bar in the slot in the side of the weights. With the slot in the weights receiving the entire size of the bar, the folding dumbell and barbell device, when folded is the thickness of the weights. All parts remain attached for folding.