Weighing device used with piece goods, having a belt conveyor, one or more below positioned scales of rigid arrangement and a support for goods being weighed. The belt conveyor has at least two belts. The support has at least one support extension guidable through between the belts, and the belts can move toward the scale such that support extensions are guided through between the conveyor belts without moving themselves. Goods moved on the belts are laid upon the support extensions and weighed. The conveyor unit above the scale is moveable, in its entirety, towards the weighing scale. Conveyor movement end positions are damped. The conveyor is moved by a single actuator, and at least two weighing scales are used with different weighing regions. A coating installation for car exhaust gas catalyst carriers is provided with the weighing device. A method of weighing piece goods using the weighing device is provided.