Proposed are a weighing device for a packaging machine and a method for weighing packages from a packaging machine, which can be realized in a space-saving manner and/or permit the processing of packages within a large spectrum of package formats. This is achieved according to the invention in that the weight of two or more packages (7′, 7″) and the weight which is changed as a result of the subsequent supply or lead-away of an individual package (7″) or of a number of packages which are to be weighed together are measured, with it being possible for the weight of an individual package (7″) or of a number of packages which are to be weighed together to be determined from the difference between the weights which are determined in this way.