A gram, a commonly used unit of mass in the metric system, is one-thousandth of a kilogram. The abbreviation for gram is "g," and "kg" represents a kilogram.
The SI base unit for mass is the kilogram. One gram equals 15.432 grains or 0.0352739619 U.S. ounces. One gram is nearly equal to the mass of one cubic centimeter of water.
The word "gram" comes from the French word, "gramme," a metric unit of weight, and "gramme" was derived from the Latin and Greek words "gramma," which mean "small weight." The word "gram" was first used in the English language in 1797, and the gramme was established as unit of the metric system by a 1799 law in France.