The US liquid quart equals 946 millilitres โ 2 pints or 1/4 US gallon. The UK imperial quart (1.137 L) is larger, like the other UK liquid units. Quarts are used in US cooking recipes and for motor-oil bottles.
Real-world: A US quart of motor oil is 946 ml. A "quart of milk" in the US โ 1 L. UK "quart" is rare today.
Read full quart reference โThe oil barrel equals 158.987 litres or 42 US gallons. It is the global pricing unit for crude oil and petroleum products. The US dry barrel (115.6 L) and UK beer barrel (163.7 L) are different units that share the same name.
Real-world: Brent crude and WTI oil are priced in US dollars per barrel. Global oil demand is about 100 million barrels per day.
Read full barrel reference โ