A method for calibrating a blade of a motor grader is disclosed. The method comprises resting the blade on a ground plane in a first configuration and then a second configuration, calculating coordinates of a left blade tip and a right blade tip of the blade with reference to coordinates of a frame, while the blade being rested on the ground plane in each of the first configuration and the second configuration, determining a pitch offset, a roll offset and a height offset from the coordinates of the left blade tip and the right blade tip of the blade, and transforming the coordinates of the frame to coordinates of the ground plane using the pitch offset, the roll offset, and the height offset. The transforming equalizes height for the left blade tip with respect to the right blade tip as a constant in each of the first and second configurations and the constant determines a cut depth of the blade in the ground.