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Click symbol for equation atomic mass constant energy equivalent  Numerical value  1.492 418 085 60 x 10-10 J  Standard uncertainty  0.000 000 000 45 x 10-10 J   Relative standard uncertainty  3.0 x 10-10  Concise form  1.492 418 085 60(45) x 10-10 J       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