Metric System of Measurements
Metric System of Measurements In the metric system of measurements, the principal unit for length is the meter, the principal unit for volume, the liter, and the principal unit for weight, the gram. The following prefixes are used for subdivisions and multiples: micro = 1/1 000,000, milli = 1/1000, centi = 1/100, deci = 1/10, deca = 10, hecto = 100, kilo = 1000, mega =, 1000000. In abbreviations, the subdivisions are frequently used with a smaller letter and the multiples with a capital letter, although this practice is not universally followed everywhere the metric system is used. All the multiples and the subdivisions are not used commercially. Those ordinarily used for length are kilometer, meter, centimeter, and millimeter, for area, square meter, square centimeter and square millimeter, for volume, cubic meter, cubic decimeter (liter), cubic centimeter, and cubic millimeter. The most commonly used weights are the kilogram and gram. The metric system was legalized in the United States by an Act of Congress in 1966.
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