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Click symbol for equation Planck length  Numerical value  1.616 255 x 10-35 m  Standard uncertainty  0.000 018 x 10-35 m   Relative standard uncertainty  1.1 x 10-5  Concise form  1.616 255(18) x 10-35 m       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