The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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Constants
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Constants,
Units &
Uncertainty
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Newtonian constant of gravitation
 $ G $
 Numerical value  6.674 30 x 10-11 m3 kg-1 s-2
 Standard uncertainty  0.000 15 x 10-11 m3 kg-1 s-2
  Relative standard uncertainty  2.2 x 10-5
 Concise form  6.674 30(15) x 10-11 m3 kg-1 s-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

 
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