Unit of measurement for mass in the International System of Units (SI).


The symbol for gram is “g” which signifies “gram.”

  • In one gram, there are 1000 milligrams and we write: 1 g = 1000 mg.
  • In one kilogram, there are 1000 grams and we write: 1 kg = 1000 g.
  • One gram corresponds to the mass of one cubic centimetre of pure water at a temperature of 4°C.


  • The mass of a pill is about 45 mg.
  • The mass of an average apple is about 250 g.
  • On average, the mass of an adult man is 75 kg.
  • One litre of air weighs 1.3 g.
  • One standard sheet of paper weighs about 5.6 g.

Historical note

The term “gram” comes from the ancient Greek word γράμμα, and it is equal to one twenty-fourth of a Roman ounce. This unit of mass was created in 1793 and in 1795, the kilogram appeared, which is equal to 1000 grams.

Try Buzzmath activities for free

and see how the platform can help you.