A multi-axis balancing system is disclosed for calibrating an optical gimbal, which includes a gimbal platform defining a pitch axis and a roll axis, an inertial measurement unit located on the optical gimbal for calculating a center of mass of the optical gimbal, a weight adjustable mass moveable relative to the pitch axis and the roll axis of the gimbal platform to locate a balance point for the optical gimbal in response to active feedback from the inertial measurement unit relating to the calculated center of mass of the optical gimbal, and a multi-axis drive assembly for effectuating linear movement of the mass relative to the pitch and roll axes of the gimbal platform.