Abstract: A fluid filling system is disclosed wherein containers to be filled with fluid materials are supplied first to one or more time-metered filling stations, and then to a weight-metered filling station. At first, the time-metered filling station(s) is/are inactive, and only the weight-metered filling station is used to fill a first container to a desired final weight. A timer is used to monitor the filling time necessary to reach the desired final weight. When later containers are then supplied to the time-metered filling station(s), they are filled at each time-metered station for a filling time which is dependent on the previously measured filling time for the weight-metered filling station. These containers are then "topped off" by the weight-metered filling station to precisely fill them to the desired final weight, and the time required for such topping off is measured for use in subsequent modification of the filling times at the time-metered filling stations.