Quarters [US] to stones formula

The stone is a unit of mass commonly used in the British imperial system of measurement. One stone is equal to 14 pounds, which is about 6.35 kilograms in the International System of Units (SI).

In some countries, particularly the United Kingdom and Ireland, stones are commonly used to measure body weight. For example, a person's weight might be expressed as "10 stone 5 pounds" rather than as an individual weight in kilograms or pounds.

Stones are also used to express the weight of some large objects, such as animals or building materials. In the construction industry, for example, the weight of roofing materials or wall coverings may be expressed in stone.

The stone is a less common unit of mass compared to other units such as the pound or kilogram, and is used primarily in the United Kingdom and other countries that use the British Imperial System of measurement.