New search facility:  
BIPM Home | Site map | Metrology portal | KCDB | JCTLM-DB | Contact us  
   
Resolution 8 of the 12th meeting of the CGPM (1964)
Version française
Other Resolutions
of the 12th CGPM

Summary
Participation at the General Conference
23rd meeting of the CGPM (2007): Presentations by CC Presidents
22nd meeting of the CGPM (2003): Presentations by CC Presidents
Proceedings of the CGPM
Resolutions of the CGPM
Chain of responsibility
The benefits of participating in the BIPM
Procedure for a State to become a Member of the BIPM
Procedure for a State or Economy to become an Associate of the General Conference
Evolving Needs for Metrology in Trade, Industry and Society, and the Role of the BIPM
National and International Needs Relating to Metrology
Direct access
 
SI prefixes femto and atto* (7) (9)

The 12th Conférence Générale des Poids et Mesures (CGPM),

decides to add to the list of prefixes for the formation of names of multiples and submultiples of units, adopted by the 11th CGPM, Resolution 12, paragraph 3, the following two new prefixes:

Multiplying factor Prefix Symbol
10–15 femto f
10–18 atto a


Reference:
Comptes Rendus de la 12e CGPM (1964), 1965, 94

Note:

New prefixes were added by the 15th CGPM in 1975 (Resolution 10).

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