The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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von Klitzing constant
 $  R_{\rm K} = \mu_0 c/2\alpha= 2\rmpi\hbar/e^2$
 Numerical value  25 812.807 45... OmegaRed
 Standard uncertainty  (exact)
  Relative standard uncertainty  (exact)
 Concise form  25 812.807 45... Omega    
 
Click here for correlation coefficient of this constant with other constants
Source: 2022 CODATA     
recommended values
 
Definition of
uncertainty
 
     Correlation coefficient with
any other constant

 
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