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Click symbol for equation proton gyromagnetic ratio in MHz/T  Numerical value  42.577 478 518 MHz T-1  Standard uncertainty   0.000 000 018 MHz T-1   Relative standard uncertainty  4.2 x 10-10  Concise form  42.577 478 518(18) MHz T-1       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