Gram is a unit of mass (quantity of matter) in the metric system. One gram contains about as much mass as 1 cubic centimeter of water whose temperature is 4 °C (39.2 °F) at sea level. The gram is commonly used to measure weight. One gram equals 0.035 avoirdupois ounce, and 1 avoirdupois ounce equals 28.350 grams. The gram is used to weigh light articles, especially drugs and medicines. There are 1,000 grams in a kilogram. The symbol for gram is g.
