Imperial units of weight - avoirdupois

16 oz= 1 lb
14 lb= 1 stone
2 stone= 1 qtr
4 qtrs= 1 cwt
20 cwt= 1 ton
oz - ounce
lb - pound
qtr - quarter
cwt - hundredweight
112 lb= 1 cwt
8 stone= 1 cwt
2240 lb= 1 ton