Method for determining the load capacity of a crane in a specific configuration, wherein a) the crane has at least two assemblies, b) the crane has a plurality of configuration options, which are determined by parameters of the assemblies, c) the load capacity, contingent on the assemblies, of the crane depends on at least one parameter of the respective assembly, d) at least one first assembly (1, 2, 4, 6) is specified by a smallest number of parameters and/or has a smallest variation possibility of the parameter or parameters and/or has a smallest gradient of the change of the maximum bearing load when changing one or more parameters, and e) at least one second assembly (3, 5) is specified by a largest number of parameters and/or has a largest variation possibility of the parameter or parameters and/or has a largest variation possibility of the parameter or parameters and/or has a largest gradient of the change of the maximum bearing load when changing one or more parameters, f) the concretely present values of the parameters of the at least one first assembly (1, 2, 4, 6) and of the at least one second assembly (3, 5) in the specific configuration of the crane are determined, g) the load capacity, contingent on the assemblies, of the at least one first assembly (1, 2, 4, 6) is calculated and/or predetermined depending on at least one of the parameters of the at least one first assembly (1, 2, 4, 6) and stored and read out from a memory for the concretely present value(s) of the parameter or parameters; h) the load capacity, contingent on the assemblies, of the at least one second assembly (3, 5) is ascertained or calculated from the concretely present values of the parameter or parameters of the second assembly (3, 5), wherein the ascertaining or calculating result is checked based on one or more stored values, wherein the stored parameter sets are used to check a calculation, said parameter sets agreeing with the concrete parameter values and/or having a smallest deviation above and/or below for each parameter; and i) the load capacity of the crane is determined based on the bearing loads of the at least one first assembly (1, 2, 4, 6) and the at least one second assembly (3, 5), said bearing loads being determined in this way and contingent on the assembly. a) the crane has at least two assemblies, b) the crane has a plurality of configuration options, which are determined by parameters of the assemblies, c) the load capacity, contingent on the assemblies, of the crane depends on at least one parameter of the respective assembly, d) at least one first assembly (1, 2, 4, 6) is specified by a smallest number of parameters and/or has a smallest variation possibility of the parameter or parameters and/or has a smallest gradient of the change of the maximum bearing load when changing one or more parameters, and e) at least one second assembly (3, 5) is specified by a largest number of parameters and/or has a largest variation possibility of the parameter or parameters and/or has a largest variation possibility of the parameter or parameters and/or has a largest gradient of the change of the maximum bearing load when changing one or more parameters, f) the concretely present values of the parameters of the at least one first assembly (1, 2, 4, 6) and of the at least one second assembly (3, 5) in the specific configuration of the crane are determined, g) the load capacity, contingent on the assemblies, of the at least one first assembly (1, 2, 4, 6) is calculated and/or predetermined depending on at least one of the parameters of the at least one first assembly (1, 2, 4, 6) and stored and read out from a memory for the concretely present value(s) of the parameter or parameters; h) the load capacity, contingent on the assemblies, of the at least one second assembly (3, 5) is ascertained or calculated from the concretely present values of the parameter or parameters of the second assembly (3, 5), wherein the ascertaining or calculating result is checked based on one or more stored values, wherein the stored parameter sets are used to check a calculation, said parameter sets agreeing with the concrete parameter values and/or having a smallest deviation above and/or below for each parameter; and i) the load capacity of the crane is determined based on the bearing loads of the at least one first assembly (1, 2, 4, 6) and the at least one second assembly (3, 5), said bearing loads being determined in this way and contingent on the assembly.