Length
1 mm = 0.03937 inches
1 cm = 10 mm = 0.3937 inches
1 decimeter = 10 centimeter = 3.937 inches
1 meter = 10 decimeters = 1.0936 yards = 3.2808 feet
1 kilometer = 1000 meters = 0.6214 miles
1 nautical mile = 1852 meters = 1.1500 miles

Area
1 square centimeters = 0.155 square inches
1 square meter = 1.196 square yards
1 acre = 100 square meters = 119.6 square yards
1 hectare = 100 ares = 2.471 acres
1 square kilometer = 0.386 square miles 

Volume
1 cubic centimeters = 0.061 cubic inches
1 cubic meter = 1.308 cubic yards

Volume
1 ml = 0.002 pint
1 cl = 10 ml. Ml = pint
1 dl = 10 cl = pint
1 liter = 10 l = 1.76 pints

Weight
1 milligram = 0.015 grain
1 PCT = 10 mg = 0.154 gram Valley
1 min g = 10 g = 1.543 Valley PCT
1 gram = 10 grams = 15.43 Valley
1 100 grams = 100 grams = 3.527 ounces
1 kilogram = 1000 grams = 2.205 pounds
1 ton, tonne = 1000 kilograms = 0.984 metric tonnes