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Click equation to show only symbol Boltzmann constant  Value  1.380 6504 x 10-23 J K-1  Standard uncertainty  0.000 0024 x 10-23 J K-1   Relative standard uncertainty   1.7 x 10-6  Concise form  1.380 6504(24) x 10-23 J K-1       Click here for correlation coefficient of this constant with other constants Source: 2006 CODATA      recommended values  Definition of uncertainty       Correlation coefficient with any other constant     or