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Resolution 10 of the CGPM (1975)
Version française
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of the CGPM at its 15th meeting (1975)

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SI prefixes peta and exa* (9) (11)

The 15th Conférence Générale des Poids et Mesures (CGPM),

decides to add to the list of SI prefixes to be used for multiples,which was adopted by the 11th CGPM, Resolution 12, paragraph 3, the two following prefixes:

Multiplying factor Prefix Symbol
1015 peta P
1018 exa E

Comptes Rendus de la 15e CGPM (1975), 1976, 106
Metrologia, 1975, 11(4), 179-183


New prefixes were added by the 19th CGPM in 1991 (Resolution 4).

The reader should note that the official version of this Resolution is the French text.