1 ton is about 7 barrels. If the oil quality is light (thin), 1 ton is about 7.2 barrels or 7.3 barrels. Gas stations in the United States and Europe are usually in gallons, while gas stations in China are priced in liters. 1 barrel = 158.98 liters =42 gallons. American 1 gallon =3.785 liters, British 1 gallon = 4.546 liters. If the volume is converted into weight, it is related to the density of crude oil. Assuming that the density of crude oil in a local area is 0.99 kg/L, the weight of a barrel of crude oil is158.98× 0.99 =157.3902 kg.