10 millimeters [mm] = 1 centimeter
10 centimeters [cm] = 1 decimeter
10 decimeters [dm] = 1 meter
10 meters [m] = 1 dekameter [dam]
10 dekameters= 1 hectometer [hm]
10 hectometers = 1 kilometer [km] 
10 milligrams [mg] = 1 centigram
10 centigrams [cg] = 1 decigram
10 decigrams [dg] = 1 gram [g]
10 grams = 1 dekagram [dag]
10 dekagrams= 1 hectogram [hg]
10 hectograms = 1 kilogram [kg]
1,000 kilograms = 1 metric ton [t] 
100 sq. mm = 1 sq. centimeter
10,000 sq. centimeters = 1m^{2}
100 sq. meters = 1 acres [a]
100 acres = 1 hectare [h]
100 hectares = 1 sq. kilometer
