The weighing apparatus according to the invention is for use on a support surface which is subject to vibration. The apparatus includes a base adapted to be positioned on the support surface and having opposing first and second sides. The base is adapted to transmit vibrations from the support surface. A tray holds the product to be weighed and has a center of gravity adjacent the first side of the base. A load cell supports the tray on the base at the first side of the base. Strain gauges connected to the load cell generate a signal indicative of the weight of the tray and any product held thereby. The signal includes oscillating noise corresponding to vibrations transmitted by the base through the load cell to the tray. An auxiliary beam and counterbalance weight stablize the tray by minimizing at least some of the vibrations transmitted to the tray and by converting at least some of the lower frequency vibrations transmitted to the tray into vibrations having a frequency which is higher than the frequency of the lower frequency vibrations. The tray transmits reverse-phase vibrations to the load cell which result in noise in the signal. The auxiliary beam and counterbalance converts at least some of the reverse-phase vibrations transmitted to the load cell into vibrations having a frequency which is higher than the frequency of the reverse-phase vibrations.