The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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Constants,
Units &
Uncertainty
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elementary charge
 $e$
 Value  1.602 176 565 x 10-19 C
 Standard uncertainty  0.000 000 035 x 10-19 C
  Relative standard uncertainty   2.2 x 10-8
 Concise form  1.602 176 565(35) x 10-19 C    
 
Click here for correlation coefficient of this constant with other constants
Source: 2010 CODATA     
recommended values
 
Definition of
uncertainty
 
     Correlation coefficient with
any other constant

 
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