If you are new to purchasing seafood, you may wonder how much a bushel of oysters weigh. Regardless of where you buy your bushel of oysters, you will get a gallon of oyster meat. This is because oyster growers must sort their harvests by size according to the same US industry standards. One bushel of oysters weighs between 40 and 65 pounds. A bushel is a unit of volume, not of weight. The problem of measuring oysters by weight is that the bulk of the weight is in the shell.