The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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  Conversion from u to eV  
Conversion equation:  (1 u)c2 = x eV
x = {muc2/e}
 
  Value of conversion factor:  x = 931.494 061(21) x 106  
Your input value:  1.000 000 000 000 00... u 
 Your converted value:  9.314 940 61(21) x 108 eV 
 
Note: {Q} is the numerical value of Q when Q is expressed in SI units
 
Source: 2006 CODATA     
recommended values
 
Definition of
uncertainty
 
     Basis of conversion factors
for energy equivalents

 

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