Abstract: An improved method and related apparatus for filling a plurality of containers more accurately with a predetermined net weight or volume of fluid by filling means located at a filling station on a line. The weights are determined upstream of the filling station. The containers are filled according to a set point, then the containers are moved to a gross weighing station where they are weighted full and tare weight is deducted therefrom. Corrections based on net values of tare weight and gross weight are applied to the set point of the filling means. The specific gravity of the fluid is input to processing means to allow the net volume of the contents of the containers to be calculated.