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.


Units Grains Drachms Ounces Pounds Stones Quarters Long Hundredweights Long Tons Metric Values
Stones 98,000 3,584 224 14 1 12 18 1160 6.35029318 Kilogrammes


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