Convert Quarter (US) to Stone (US)

The quarter originated in medieval England as a unit of mass for measuring grain and other agricultural products. It was defined as 1/4 of a hundredweight, or 25 pounds. The term "quarter" comes from the Latin word "quartarius", meaning "fourth part". The quarter was used in trade and agriculture for centuries and was adopted in the United States as part of the U.S. customary system.

The stone as a unit of mass has roots dating back to ancient times, where it was used in various cultures for weighing goods, with the weight of a stone varying by country and commodity. In the UK, the stone was historically used to measure items like wool, and the weight of the stone varied (ranging from 5 to 30 pounds) based on the goods being measured. The U.S. adopted a 14-pound stone in the 19th century, primarily as a way to measure body weight, though it is now largely replaced by the pound for more precise measurements. The 14-pound stone is still used informally in some areas, especially in the context of body weight.