Abstract: An apparatus for use in combination with a cylindrical bale hay baler for efficiently determining the weight of the bale and comprising a lever assembly secured between the baler body and at least one of the support wheels thereof for yieldably supporting the baler body with respect to the wheel, a sensing device interposed between the body and the lever assembly for detecting vertical deflection of the body with respect to the wheel engaging the surface of the ground, and a weight indication device operably connected with the sensing device for providing a continual visual indication of the weight of the hay bale whereby the weight of the hay bale may be substantially accurately determined at any desired time during the baling operation.