LENGTHS
1 inch = 25.4 millimeters
1 meter = 3.28 feet = 39.37 inches
1 mile = 5280 ft = 1760 yards = 1.609 kilometers = 1609 meters
AREAS
1 square inch = 6.45 square centimetres = 645 square millimetres
1 square metre = 10.76 square feet = 1.196 square yards
1 are = 100 square metres = 119.6 square yards
1 hectare = 10,000 square metres = 100 ares = 2.47 acres
1 square kilometres = 100 hectares = 1,00,000 square metres
1 acre = 4840 square yards = 0.4047 hectares
1 square (Gunter's) chain = 484 square yards = 0.1 acres
1 square miles = 640 acres = 2.59 square kilometres
VOLUMES
[There are three different types of gallon used in English speaking world, i.e. Imperial Gallon, Wet US Gallon, Dry US Gallon]
1 cubic feet = 6.24 Imperial Gallon [1 imperial gallon of water weights 10 lb]
1 US wet gallon = 0.833 imperial gallon = 3.785 litres
1 US dry gallon = 0.967 imperial gallon = 4.404 litres
1 imperial gallon = 4.546 litres
1 litre = 0.22 imperial gallon
1 US barrel (bbl.) = 5.62 cubic feet
1 cubic metre = 35.28 cubic feet
1 acre-foot = 43,560 cubic feet = 0.5 cusec-day
WEIGHTS
PRESSURE or STRESS
MISCELLANEOUS
