The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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hertz-hartree relationship
 $ (1\,{\rm Hz})\,h = [{\rm Hz}\,h/(2\,hc\, R_\infty)]\, E_{\rm h} $
 Numerical value  1.519 829 846 0570 x 10-16 Eh
 Standard uncertainty  0.000 000 000 0029 x 10-16 Eh
  Relative standard uncertainty  1.9 x 10-12
 Concise form  1.519 829 846 0570(29) x 10-16 Eh    
 
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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