The stone or stone weight is an English and imperial unit of mass equal to how many pounds (kilograms)?

The stone or stone weight is an English and imperial unit of mass equal to how many pounds (kilograms)?

The stone or stone weight is an English and imperial unit of mass equal to 14 pounds (approximately 6.35 kg). The stone continues in customary use in the United Kingdom and Ireland for body weight. The name “stone” derives from the practice of using stones as weights, a common practice for two millennia or more.

England and other Germanic-speaking countries of northern Europe formerly used various standardized “stones” for trade, with their values ranging from about 5 to 40 local pounds (roughly 3 to 15 kg) depending on the location and objects weighed. With the advent of metrification, Europe’s various “stones” were superseded by or adapted to the kilogram from the mid-19th century on.

Today, the stone is used in horse racing to describe the weight that a horse has to carry (not necessarily just the jockey, but penalty weight). It is also used to express human bodyweight in some sports, such as boxing and wrestling. Stone is a descriptive term used almost exclusively in the United Kingdom and Ireland, as a popular – if informal – way of expressing a person’s weight. However, the stone has not been officially recognized as a unit of weight in the United Kingdom since 1985.

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