A method and the associated device for ascertaining the center-of-gravity height of a motor vehicle, in which a variable representing the rolling motion of the vehicle about its roll axis oriented in the vehicle longitudinal direction is ascertained, a variable representing the lateral acceleration of the vehicle is ascertained, the center-of-gravity height is ascertained from the variable representing the rolling motion and the variable representing the lateral acceleration, the center-of-gravity height is ascertained only in predefined driving conditions, the change in the roll rate per unit of time entering into the ascertainment of the predefined driving conditions.