The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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hartree-electron volt relationship
 $1 \ E_{\rm h}$
 Value  27.211 386 02 eV
 Standard uncertainty   0.000 000 17 eV
  Relative standard uncertainty   6.1 x 10-9
 Concise form  27.211 386 02(17) eV    
 
Click here for correlation coefficient of this constant with other constants
Source: 2014 CODATA     
recommended values
 
Definition of
uncertainty
 
     Correlation coefficient with
any other constant

 
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