Abstract: In a device for determining the weight of a motor vehicle which is being moved by propulsive forces in its longitudinal direction, signals which correlate with a propulsive force and with a corresponding vehicle longitudinal acceleration are recorded with the aid of a sensing system during successive time intervals. Signals recorded at at least two points in time are used by a computer to produce a signal which correlates to the vehicle's weight. To enhance the device's accuracy, signals for the propulsive force and for the corresponding vehicle longitudinal acceleration are detected at successive points in time which follow one another at constant time intervals. The signals in a memory are stored, where they form a time sequence for the propulsive forces and the corresponding vehicle longitudinal accelerations. A plurality of successive stored signals of the time sequence are read from the memory and used to generate the signals that correlate to the current weight of the vehicle.