This is the standard unit of mass in the British system of units. It has since been replaced by the SI system and the kg.
|16 ounces (oz)||=||1 pound (lb)||1 stone||=||14 pounds (lb)|
|1 quarter||=||28 pounds (lb)||1 hundredweight (cwt)||=||112 pounds (lb)|
|1 ton||=||2240 pounds (lb)||20 hundredweight (cwt)||=||1 ton|
|1 pound (lb)||=||0.453592 kg|