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		CODATA Internationally recommended 2014 values of the

Constants Topics: Values Energy Equivalents Searchable Bibliography Background Constants Bibliography Constants, Units & Uncertainty home page

Version history and disclaimer   (e.g., electron mass, most misspellings okay) Search by name    Display  alphabetical list,   table (image), or   table (pdf)      by clicking a category below Find the correlation coefficient between any pair of constants See also Article on the 2014 adjustment of the values of the constants Wall Chart and Wallet Card of the 2014 constants Background information related to the constants Links to selected scientific data Previous Values (2010) (2006) (2002) (1998) (1986) (1973) (1969) DEADLINE NOTICES (UPDATED)! There will be an adjustment of the constants to provide the values for a revision of the International System of Units (SI) expected to take place in 2018. To be considered for use in this adjustment, new results must be accepted for publication by 1 July 2017. The 2018 CODATA adjustment of the fundamental constants will be based on the revised SI, which will significantly affect the uncertainties of many constants. For data to be considered for use in this adjustment, they must be discussed in a publication preprint or a publication by 31 December 2018.

Detailed contents  About this reference  Feedback  Get the PDF Reader Privacy Statement / Security Notice - NIST Disclaimer NIST Standard Reference Database 121. Last Update to Data Content: 2015. DOI: http://dx.doi.org/10.18434/T4WW24 Rate our products and services. Online: October 1994   -   Last update: September 2018