TGFC - Previous Recommended Values and Publications

The CODATA Task Group on Fundamental Physical Constants has been publishing recommended values for the Fundamental Physical Constants since 1969.


2010 Recommended Values

The 2010 Recommended Values for the Fundamental Physical Contants, called the 2010 LSA, was released early in 2011 on the NIST Reference on Constants, Units and Uncertainty and published in 2012 simultaneously in two academic journals, Reviews of Modern Physics and the Journal of Physical and Chemical Reference Data.

Peter J. Mohr, Barry N. Taylor, and David B. Newell, 'CODATA recommended values of the fundamental physical constants: 2010' (2012).

Abstract: This paper gives the 2010 self-consistent set of values of the basic constants and conversion factors of physics and chemistry recommended by the Committee on Data for Science and Technology (CODATA) for international use. The 2010 adjustment takes into account the data considered in the 2006 adjustment as well as the data that became available from 1 January 2007, after the closing date of that adjustment, until 31 December 2010, the closing date of the new adjustment. Further, it describes in detail the adjustment of the values of the constants, including the selection of the final set of input data based on the results of least-squares analyses. The 2010 set replaces the previously recommended 2006 CODATA set and may also be found on the World Wide Web at


Previous Recommended Values