Calculating device and method for carrying out status calculations in an electricity network (2) with a multiplicity of nodes (K1-K11). The method comprises the allocation of a local calculating agent (A1-A11) to each of the multiplicity of nodes (K1-K11), the allocation of regional calculating agents (R1, R2) to regional networks (3, 4), the reception by the regional calculating agents (R1, R2) of the results of the status calculations from the associated local calculating agents (A1-A11) and, on the basis thereof, the performance of a status calculation for the associated regional network (3, 4). The method further comprises the creation of a simplified network representation of the associated regional network (3, 4) and the reception by a higher-order regional calculating agent (R3) of the results of the status calculations and the simplified network representations of the regional calculating agents (R1, R2), and, on the basis of the simplified network representations, calculation of the status of the electricity network (2).