CODATA Value: Newtonian constant of gravitation over h-bar c

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Newtonian constant of gravitation over h-bar c
$G/\hbar c$

Numerical value 6.708 83 x 10^-39 (GeV/c²)^-2

Standard uncertainty 0.000 15 x 10^-39 (GeV/c²)^-2

  Relative standard uncertainty 2.2 x 10^-5

Concise form 6.708 83(15) x 10^-39 (GeV/c²)^-2

Click here for correlation coefficient of this constant with other constants

Source: 2018 CODATA
recommended values Definition of
uncertainty      Correlation coefficient with
any other constant