Convert Ounce to Stone (US)

The ounce traces its origins to ancient Roman times, where it was based on the uncia, which was 1/12 of a Roman pound (libra). The term "ounce" comes from the Latin "uncia", meaning one-twelfth. In medieval Europe, the ounce evolved as a standardized unit of weight, especially in trade. By the 14th century, the Avoirdupois ounce became the standard for most goods in England, which is equivalent to about 28.35 grams. This measurement was later adopted in the United States and other countries using the imperial 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.