Stone (unit)

informal unit of measure equal to 14 pounds avoirdupois

The stone is a unit for measuring mass in the Imperial system. It is equal to fourteen pounds. 160 stone make up a long ton. In the metric system, 1 stone = 6.35029318 kilograms.

The short way of writing stones is st.

Mass

UnitsGrainsDrachmsOuncesPoundsStonesQuartersLong HundredweightsLong TonsMetric Values
Stones98,0003,584224141121811606.35029318 Kilogrammes

Usage

The stone was outlawed in Ireland and the United Kingdom, in 1983 and 1985 respectively. However stones and pounds are both commonly used in non-official cases, most commonly when stating the weight of a person. Often in American-British boxing matches, the contenders  weight is stated in pounds then stones and pounds. The same in horse racing