The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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Constants,
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Uncertainty
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Click symbol for equation
vacuum electric permittivity
 $\varepsilon_0$
 Numerical value  8.854 187 8128 x 10-12 F m-1
 Standard uncertainty  0.000 000 0013 x 10-12 F m-1
  Relative standard uncertainty  1.5 x 10-10
 Concise form  8.854 187 8128(13) x 10-12 F m-1    
 
Click here for correlation coefficient of this constant with other constants
Source: 2018 CODATA     
recommended values
 
Definition of
uncertainty
 
     Correlation coefficient with
any other constant

 
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