barrels per day (bpd)

Production of crude oil and petroleum products is frequently measured in barrels per day. A barrel is a volume measure of forty- two United States gallons. Conversion of barrels to metric tons depends on the density of the special product. About 7.3 barrels of average crude oil weigh one metric ton. Heavy products would be about seven barrels per metric ton. Light products, such as gasoline and kerosene, would average eight barrels per metric ton.

Source: Library of Congress