The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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Constants,
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Uncertainty
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Correlation coefficient between two constants
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    
 
molar volume of ideal gas (273.15 K, 101.325 kPa)
 $V_{\rm m}$
 Numerical value  22.413 969 54...  x 10-3 m3 mol-1
 Standard uncertainty  (exact)
  Relative standard uncertainty  (exact)
 Concise form  22.413 969 54... x 10-3 m3 mol-1    
 
Correlation coefficient r of the above two quantities:
r  =  0.0
Click here to select a new correlation pair
Source: 2022 CODATA     
recommended values
 
Definition of
uncertainty
 
      Correlation coefficient with
any other constant

 
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