A method is provided for weighing and filling a plurality of containers. The method involves providing a plurality of moving weigh members each comprising a moveable member which is moveable in proportion to the weight of material in a container weighed by the weigh member, and a fixed reference member fixed with respect to the weigh member so as to move therewith. The position of the moveable member of each weigh member is automatically and electrooptically measured relative to the fixed reference member thereof. The weight of the material in the container is determined from the relative position of the moveable member with respect to the fixed reference member. Based on this determined weight, filling of the container, or subsequent filling of similar containers, is terminated, added to or subtracted from.