The invention relates to a method and device for determining a reference speed in a vehicle. The aim is to provide an economical method and device which will enable the reference speed of a vehicle to be determined accurately and reliably. To this end, the wheel speeds of at least two wheels (111, 121) of the vehicle are measured (112, 122). The wheel speeds of at least two wheels are then taken into account in calculating the reference speed (113). The invention can be used in both vehicle traction control systems or anti-slip systems and anti-locking systems, especially in an all-wheel drive passenger vehicle, for example a four-wheel drive passenger vehicle.