A revolution counter including sensors, which generate position values that define an angular position of a shaft, and a determination unit that receives the position values and generates decision signals therefrom, wherein the decision signals determine counting sectors. The revolution counter includes a counting control unit that receives the counting sectors, and operates the revolution counter in a first mode or a second mode of operation. The counting control unit switches over to the second mode, if after a length of time no change in one of the counting sectors takes place, and switches over to the first mode if a change in one of the counting sectors does take place. The determination unit determines an uncertainty range between each pairing of the counting sectors. The counting control unit does not take the uncertainty ranges into account for the switchover from the second mode to the first mode.