Unit Definition (quarter (ton) [US]) The quarter (ton) [US] is a traditional unit of weight equal to 1/4 hundredweight. In the U.S., "quarter" is also used informally to mean 1/4 ton, or 500 pounds (226.80 kilograms).
Unit Definition (avogram) The avogram is a unit of mass, equal to 1 gram divided by the Avogadro number.
Weight/Mass 
