A computer-implemented method for determining center of gravity of a tiltrotor aircraft includes storing a multi-dimensional matrix mapping multiple tiltrotor aircraft parameters to a plurality of three-dimensional (3D) centers of gravity of the tiltrotor aircraft, where each 3D center of gravity includes a respective longitudinal center of gravity, lateral center of gravity, and vertical center of gravity. The method includes receiving input signals from corresponding on-board sensors, where the input signals represent characteristics of the tiltrotor aircraft, determining tiltrotor aircraft parameters from the input signals, identifying, from the multi-dimensional matrix mapping, a longitudinal center of gravity, a lateral center of gravity, and a vertical center of gravity that corresponds to the determined tiltrotor aircraft parameters, and providing the identified longitudinal center of gravity, the identified lateral center of gravity, and the identified vertical center of gravity in response to receiving the input signals.