The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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Click symbol for equation
kelvin-atomic mass unit relationship
 $(1 \ {\rm K})k/c^2$
 Numerical value  9.251 087 2884 x 10-14 u
 Standard uncertainty  0.000 000 0029 x 10-14 u
  Relative standard uncertainty  3.1 x 10-10
 Concise form  9.251 087 2884(29) x 10-14 u    
 
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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