A system for calibrating an agricultural product metering system is provided including a calibration unit configured to be mounted to the agricultural product metering system. The calibration unit includes a load cell configured to measure a calibration weight of product exiting the agricultural product metering system, and the calibration unit is configured to output signals indicative of the calibration weight of the product. The calibration system also includes a controller configured to receive the signals and to calculate a product flow rate based on the calibration weight.
