The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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Click symbol for equation
kelvin-hartree relationship
 $(1 \ {\rm K})k$
 Numerical value  3.166 811 563 4564 x 10-6 Eh
 Standard uncertainty  0.000 000 000 0035 x 10-6 Eh
  Relative standard uncertainty  1.1 x 10-12
 Concise form  3.166 811 563 4564(35) x 10-6 Eh    
 
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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