Measurement

Gram

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

Notation

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.

Examples

  • 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.

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