# How did Coulomb arrive at value of electron charge?

Charge of one electron is known to be as $$1.6$$ x $$10^{-19}$$ C or alternative 1 Coulomb contains charge of $$6.24$$ x $$10^{18}$$ electrons. I am just wondering if these numbers are arbitrarily chosen or were derived through some calculations?

• @FredericThomas Thanks. This actually should be an answer because I now know where that number is coming from. – PagMax Dec 10 '18 at 18:17
• Also I think you meant It was NOT Coulomb – PagMax Dec 10 '18 at 18:18
• It was not Coulomb who found the charge of an electron, it was R. Milikan in 1909 who measured for the first time the charge of an electron in a oil drop experiment (see more on Wikipedia "oil drop experiment"). Sorry a typo slipped in, now it's correct. – Frederic Thomas Dec 10 '18 at 18:53