1. The Meter, the unit of length, = 3.280899 feet = 39.37079 inches.
2. The Are, the unit of surface, = 1 square dekameter = 119.60332 square yards.
3. The Liter, the unit of capacity, = 1 cubic decimeter = 0.26418635 gallon = 1.0567454 quarts.
4. The Stere, the unit of solidity, = 1 cubic meter = 35.336636 cubic feet = 1.308764 cubic yards.
5. The Gram, the unit of weight, = 15.43234874 grains troy.
For practical purposes the following are commonly used as units, viz.:—
For itinerary measure, the kilometer = 0.62138 mile. For land measure, the hektare = 2.47114 acres. For commercial weight, the kilogram = 2.20462125 pounds. The nickel five-cent piece, coined since 1866, weighs exactly 5 grams.