In a method and a device for operating a user interface in a vehicle, in particular for determining and displaying information in connection with electrical consumers, an operator action is detected, by which the operation of an electrical consumer disposed in the vehicle is modified, and a change in the energy consumption of the electrical consumer caused by the operator action is determined. Using the determined energy consumption, a change in the travel range of the vehicle caused by the modified operation of the electrical consumer is calculated, and the calculated change in travel range is displayed directly. The method and the device are especially suitable for a vehicle driven by an electric motor.