The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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electron volt-atomic mass unit relationship
 $(1 \ {\rm eV})/c^2$
 Value  1.073 544 1105 x 10-9 u
 Standard uncertainty  0.000 000 0066 x 10-9 u
  Relative standard uncertainty   6.2 x 10-9
 Concise form  1.073 544 1105(66) x 10-9 u    
 
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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