The CODATA recommended value is calculated from the measured value of the gas constant::formula_5where:*"R" is the Universal gas constant;*"N"A is the Avogadro constant;*"R"∞ is the Rydberg constant;*"A"r(e) is the "relative atomic mass" of the electron;*"M"u is the molar mass constant (1 g/mol by definition);*"α" is the fine structure constant.
To je bil glavni nerešen problem na tem področju, kar je res lepa nagrada za svojega nekdanjega učitelja.