AREA
Metric - Imperial
1 square metre = 1.1960 sq. yards

Imperial - Metric
1 square foot = 9.29 square decimeters
1 square yard = 0.8361 square metres

VOLUME
Metric - Imperial
1 cubic centimeter = 0.0610 cubic inch
1 cubic metre (one million cu. cm) = 1.308 cubic yards

Imperial - Metric
1 cubic foot (=1728 cubic inches) = 0.0283 cubic metres
1 cubic yard (=27 cubic feet) = 0.765 cubic metres

MASS
Metric - Imperial
1 gram (=1000 mg) = 15.43 grain
1 kilogram (=1000 g)  = 2.205 pounds
1 tonne (=1000 kg) = 0.984 (long) ton

Imperial - Metric
1 pound (=16 ounces =7000 grains)  = 0.45359237 kilogram
1 stone (=14 pounds) = 6.35 kilograms
1 (long) ton (=2240 lbs)  = 1.016 tonnes
1 (short) ton (=2,000 lbs)  = 0.907 tonne