A bushel is a unit of capacity in the Imperial and U.S. Customary systems of measurement. It is most frequently used to measure the volumes of dry commodities and agricultural products.
The bushel is a unit of measurement with a long history. It was introduced after the Norman Conquest of England in the 11th century. The modern measure of a bushel is based on the Winchester bushel, which was equivalent to the volume of cylinder with a diameter of 18 inches and a height of 8 inches.
The United States Customary system of measurement uses a simplified version of the Winchester bushel, which is equivalent to 2,150.42 cubic inches. In commodity markets today, the bushels used to sell grains, for example, wheat, oats and barley, typically refer to a unit of mass that is specific to the type of grain being traded.