The CODATA 2017 Special Adjustment for the Revision of the SI

This paper summarizes the 2017 special leastsquares adjustment of the values of the fundamental constants performed by the Committee on Data for Science and Technology (CODATA). Based on relevant data available by 1 July 2017, exact values of the Planck constant h, elementary charge e, Boltzmann constant k, and Avogadro constant N
_A
are presented. These values are recommended to the 26
^th
General Conference on Weights and Measures (GCPM) to form the foundation of the revised SI.