Linear Measure  
1 inch Ӣ=25.4 millimetres 
1 foot Ӣ=12 inches Ӣ=0.3048 metre 
1 yard =3 feet Ӣ=0.9144 metre 
1 (statute) mile Ӣ=1760 yards 
  =1.609 kilometres ǧ
1 nautical mile =1852 m. 

Square Measure  
1 square inch ƽӢ=6.45 sq.centimetres ƽ
1 square foot ƽӢ=144 sq.in.ƽӢ
  =9.29 sq.decimetres ƽ
1 square yard ƽ=9 sq.ft. ƽӢ
  =0.836 sq.metre ƽ
1 acre ӢĶ=4840 sq.yd.ƽ=0.405 hectare 
1 square mile ƽӢ=640 acres ӢĶ
  =259 hectares 

Cubic Measure  
1 cubic inch Ӣ=16.4 cu.centimetres 
1 cubic foot Ӣ=1728 cu.in. Ӣ
  =0.0283 cu.metre 
1 cubic yard =27 cu.ft. Ӣ
  =0.765 cu.metre 

Capacity Measure  ݻ
Britich  Ӣ
1 pint Ʒ=20 fluid oz. Һ˾
  =34.68 cu.in. Ӣ=0.568 litre    
1 quart =2 pints Ʒ=1.136 litres 
1 gallon =4 quarts =4.546 litres 
1 peck =2 gallons =9.092 litres 
1 bushel ʽ=4 pecks =36.4 litres 
1 quarter ʽ=8 bushels ʽ
  =2.91 hectolitres 
American dry Ƹ
1 pint Ʒ=33.60 cu.in. Ӣ=0.550 litre 
1 quart =2 pints Ʒ=1.101 litres 
1 peck =8 quarts =8.81 litres 
1 bushel ʽ=4 pecks =35.3 litres 
American liquid Һ
1 pint Ʒ=16 fluid oz. Һ˾
  =28.88 cu.in. Ӣ=0.473 litre  
1 quart =2 pints Ʒ=0.946 litre 
1 gallon =4 quarts =3.785 litres 
Avoirdupois Weight 
1 grain =0.065 gram 
1 dram =1.772 grams 
1 ounce ˾=16 drams =28.35 grams 
1 pound =16 ounces ˾=7000 grains 
  =0.4536 kilogram ǧ
1 stone Ӣʯ=14 pounds =6.35 kilograms ǧ
1 quarter ķ֮һӢ=2 stones Ӣʯ
  =12.70 kilograms ǧ
1 hundredweight Ӣ=4 quarters ķ֮һӢ
  =50.80 kilograms ǧ
1 short ton ̶()=2000 pounds 
  =0.907 tonne 
1 (long) ton (Ӣ)=20 hundredweight Ӣ
  =1.016 tonnes 
