Method for ascertaining a net weight (Weight Product Area Net) of a packaged product (3a-3e) in a product area, wherein a plurality of contiguous product areas (L a- L e) form a product chain, characterized in that a) a total weight (Weight Total Gross) of the product chain is ascertained, b) the product chain is X-rayed using an X-ray device in order to ascertain greyscale values that correspond to the X-ray radiation that respectively penetrates a defined area of the product chain, c) the ascertained greyscale values are used to ascertain a total greyscale value ( Greyscale Value Total Gross) for the entire product chain, d) the contiguous product areas (L a- L e) with a single product (3a-3e) contained therein are selected or prescribed by means of evaluation of the ascertained greyscale values, e) a greyscale value ( Greyscale Value Product Area Gross) of each product area (L a- L e) is formed from the ascertained greyscale values, and either f) a gross weight (Weight Product Area Gross) of the product area (La-Le) is ascertained therefrom and g) approximately the gross weight (Weight Product Area Gross) is used as net weight (Weight Product Area Net) of the single product (3a-3e) or the net weight (Weight Product Area Net) is ascertained from the difference between the gross weight (Weight Product Area Gross) and a prescribed or ascertained weight (Weight Tare) of the product area (L a -L e) without a product (3a-3e), or, instead of steps f)-g), g') approximately the total weight (Weight Total Gross) is used as net weight (Weight Total Net) of the product chain or the net weight (Weight Total Net) is ascertained from the difference between the total weight (Weight Total Gross) and a prescribed or ascertained weight (Weight Total Tare) of the product chain without a product (3a-3e) and h) the net weight (Weight Product Area Net) of the single product (3a-3e) is ascertained by dividing the net weight (Weight Total Net) of the product chain according to the greyscale values (Greyscale Value Product Area Gross) of the product areas (L a -L e). a) a total weight (Weight Total Gross) of the product chain is ascertained, b) the product chain is X-rayed using an X-ray device in order to ascertain greyscale values that correspond to the X-ray radiation that respectively penetrates a defined area of the product chain, c) the ascertained greyscale values are used to ascertain a total greyscale value ( Greyscale Value Total Gross) for the entire product chain, d) the contiguous product areas (L a- L e) with a single product (3a-3e) contained therein are selected or prescribed by means of evaluation of the ascertained greyscale values, e) a greyscale value ( Greyscale Value Product Area Gross) of each product area (L a- L e) is formed from the ascertained greyscale values, and either f) a gross weight (Weight Product Area Gross) of the product area (La-Le) is ascertained therefrom and g) approximately the gross weight (Weight Product Area Gross) is used as net weight (Weight Product Area Net) of the single product (3a-3e) or the net weight (Weight Product Area Net) is ascertained from the difference between the gross weight (Weight Product Area Gross) and a prescribed or ascertained weight (Weight Tare) of the product area (L a -L e) without a product (3a-3e), or, instead of steps f)-g), g') approximately the total weight (Weight Total Gross) is used as net weight (Weight Total Net) of the product chain or the net weight (Weight Total Net) is ascertained from the difference between the total weight (Weight Total Gross) and a prescribed or ascertained weight (Weight Total Tare) of the product chain without a product (3a-3e) and h) the net weight (Weight Product Area Net) of the single product (3a-3e) is ascertained by dividing the net weight (Weight Total Net) of the product chain according to the greyscale values (Greyscale Value Product Area Gross) of the product areas (L a -L e).