There are two types of mold steel: one is round material and the other is cuboid. The method of calculating the weight of the round material: diameter (in mm) *diameter (in mm) *length (in mm) *0.0000062=the weight of the round material (in Kg) The method of calculating the weight of the cuboid: length (in mm) * width (in mm) * thickness (in mm) * 0.00000785 = weight of the cuboid (unit Kg) It should be noted that all the above dimensions are theoretical dimensions, and the actual dimensions of the material must be considered in order to make calculation more accurately.