US Quart (qt)
The US quart, symbol qt, equals 1/4 of a US gallon, or about 0.946 liters. Originating from English quart measurements, it was standardized in the US system in the 19th century. Quart is frequently used in American cooking, grocery packaging, and automotive fluids. While less common internationally due to the adoption of the metric system, the quart remains an important household and commercial measure in the United States.
US Gallon (gal)
The US gallon, denoted as gal, is a unit of volume that equals approximately 3.785 liters. It comes from old English wine gallons and became official in the US in the 1800s. People in the US still use it extensively for fuel, beverages, and cooking. The US gallon is smaller than the British one, which leads to different numbers in global trade and when comparing fuel use. Although most countries use metric units, the US gallon remains a significant part of US life.