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Click symbol for equation Planck mass  Numerical value  2.176 434 x 10-8 kg  Standard uncertainty  0.000 024 x 10-8 kg   Relative standard uncertainty  1.1 x 10-5  Concise form  2.176 434(24) x 10-8 kg       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