What is a gram?

A gram is a metric unit of mass, often used to measure small quantities of substances. One gram is equivalent to the mass of one cubic centimeter of water at 4 degrees Celsius. It is spelled as "gram" in American English and "gramme" in British English. The symbol for gram is "g" and it is used in many fields such as science, medicine, cooking, and drug dosages. One kilogram equals 1000 grams, while one milligram equals 0.001 grams. The precision of measurements involving grams can be improved with the use of scales or balances.