Unit Definition (quartern) The quartern is a traditional English unit of weight equal to 1/4 stone, 3.5 pounds, or about 1.5876 kilogram.
Unit Definition (quarter [US]) The quarter [US] is a traditional unit of weight equal to 1/4 hundredweight. In the United States, one quarter equals 25 pounds (11.3398 kilograms).
Weight/Mass 
