Abstract: The present invention relates to a method for calibrating a sensor system comprising at least one spatial sensor and at least one speed sensor, in particular for calibrating a volume measurement system, for conveying devices. According to the invention, a corresponding method comprises at least the following steps: recording reference data with an empty detection zone of the at least one spatial sensor by means of the at least one spatial sensor; conveying a cuboid test object in two different relative positions and orientations through the detection zone of the at least one spatial sensor and recording corresponding measurement data; determining an absolute orientation of the at least one spatial sensor and/or a correspondence factor for the speed sensor based on the determined reference data and measurement data using a mathematical optimization algorithm.