The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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Uncertainty
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Click symbol for equation
hartree-joule relationship
 $1 \ E_{\rm h}$
 Numerical value  4.359 744 722 2071 x 10-18 J
 Standard uncertainty  0.000 000 000 0085 x 10-18 J
  Relative standard uncertainty  1.9 x 10-12
 Concise form  4.359 744 722 2071(85) x 10-18 J    
 
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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