This app is intended to help producers quantify the seed loss from harvesting operations by converting a seed loss measurement taken during harvest into a loss per acre. The user enters the amount of seed in a sampling area of known size, either in weight, volume, or kernel number. The cutting width and sieve width are entered to determine the concentration factor. The app uses bushel or seed weight to calculate losses. These can be expressed in total loss (lbs/acre or bu/acre), as a percentage of yield, or as a cost.