Method for the computer-supported calibrating of a propagation-time-based localisation system, wherein the position of a mobile object in a predetermined environment can be determined in the localisation system by registering propagation-time-based variables of a plurality of base stations (AP1, AP2,..., AP4) belonging to a radio network, wherein the propagation-time-based variable of a respective base station (AP1, AP2,..., AP4) represents the propagation time of signals between a radio unit belonging to the mobile object and the respective base station (AP1, AP2,..., AP4), characterised in that: a) the mobile object is moved within the predetermined environment and the propagation-time-based variables of the respective base stations (AP1, AP2,..., AP4) therein are registered at a plurality of measuring instants; b) the minimum value (min) of the propagation-time-based variables of a respective base station (AP1, AP2,..., AP4) are assigned to a predefined minimum distance (dmin) of the mobile object from the respective base station (AP1, AP2,..., AP4) and the maximum value (max) of the propagation-time-based variables of a respective base station (AP1, AP2,..., AP4) is assigned to a predefined maximum distance (dmax) of the mobile object from the respective base station (AP1, AP2,..., AP4); c) for a respective base station (AP1, AP2,..., AP4) a predefined dependence between the distances (d) of the mobile object from the respective base station (AP1, AP2,..., AP4) and the propagation-time-based variables of the respective base station (AP1, AP2,..., AP4) are scaled to the assigning of the minimum value (min) to the minimum distance (dmin) and of the maximum value (max) to the maximum distance (dmax), wherein the scaled dependence (f(d)) serves to ascertain the distances (d) of the mobile object from the base stations (AP1, AP2,..., AP4) from the propagation-time-based variables when its position is being determined. a) the mobile object is moved within the predetermined environment and the propagation-time-based variables of the respective base stations (AP1, AP2,..., AP4) therein are registered at a plurality of measuring instants; b) the minimum value (min) of the propagation-time-based variables of a respective base station (AP1, AP2,..., AP4) are assigned to a predefined minimum distance (dmin) of the mobile object from the respective base station (AP1, AP2,..., AP4) and the maximum value (max) of the propagation-time-based variables of a respective base station (AP1, AP2,..., AP4) is assigned to a predefined maximum distance (dmax) of the mobile object from the respective base station (AP1, AP2,..., AP4); c) for a respective base station (AP1, AP2,..., AP4) a predefined dependence between the distances (d) of the mobile object from the respective base station (AP1, AP2,..., AP4) and the propagation-time-based variables of the respective base station (AP1, AP2,..., AP4) are scaled to the assigning of the minimum value (min) to the minimum distance (dmin) and of the maximum value (max) to the maximum distance (dmax), wherein the scaled dependence (f(d)) serves to ascertain the distances (d) of the mobile object from the base stations (AP1, AP2,..., AP4) from the propagation-time-based variables when its position is being determined.