A system for weighing containers includes a movable member having a peripheral edge in which a recess forms a seat for drawing a container, the movable member being activatable in a first movement direction such that a first wall of the seat abuts and draws the container; a container-weighing cell comprising a support plane for receiving and supporting the container; a container guide. The weighing cell, the movable member and the guide are reciprocally arranged such that when the container is drawn by the movable member the container can slide on the support plane and be guided by guide externally of the seat. The movable member is further activatable in a second, opposed, movement direction to detach the seat from the container and leave the container on the support plane for weighing.