The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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atomic unit of magnetic flux density
 $\hbar/ea_0^2$
 Numerical value  2.350 517 570 77 x 105 T
 Standard uncertainty  0.000 000 000 73 x 105 T
  Relative standard uncertainty  3.1 x 10-10
 Concise form  2.350 517 570 77(73) x 105 T    
 
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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