Contactless determination of electrical parameters. The examples describe a method and apparatus for determining electrical parameters of assemblies (printed circuit boards and as well as passive components) by the contactless determination of the spatial distribution of material. The spatial distribution of material (two-dimensional or three dimensional), is determined for example by measurement by radiographic technology with an X-ray machine or a computer tomography or by an optical instrument. The electrical parameter is determined in each volume element whose size is determined by the resolution of the method used for determining the material distribution, or a partial structure of the conductive structure.