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A 'cubic centimetre' (symbol 'cm³' or 'cc') (US spelling: 'cubic centimeter') is a commonly used unit of volume extending the derived SI-unit cubic metre and corresponds to the volume of a cubed box measuring 1 cm × 1 cm × 1 cm. One cubic centimetre corresponds to a volume of of a cubic metre, or of a litre; therefore, 1 cm³ = 1 ml. In many scientific fields, the use of cubic centimetres has been replaced by the millilitre which was used when litre was an SI base prior to 1976. The medical and automotive fields are two of the few fields wherein the term cubic centimetre was never discontinued in the United States. In the United Kingdom ml is used in preference to cc in the medical field. The initialism cc or term cubic centimetre should not be used in favour of centimetres cubed (cm³).
One cubic centimetre of water is equal to 1 gram of water.