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I don't want to load the web3 library, I do however want to convert Either to Wei, does anyone have a JavaScript function to share.

I don't mind loading a smaller library

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  • Web3 is the most popular for this sort of thing, but you can try ethereum-units instead
    – Elena Dimitrova
    Commented Oct 24, 2017 at 7:46
  • One ether is 1e18 wei. HOWEVER you will need the JavaScript big number library to be able to use numbers this large without rounding errors.
    – Alex
    Commented Oct 24, 2017 at 16:40

3 Answers 3

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Just multiply the number of ether by 1e18 (or 10**18). Done and done!

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  • Is there is difference in performance of manually multiplying and using the web3 method ?
    – Kannan Ravindran
    Commented Oct 24, 2017 at 16:28
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    FTR you actually need to multiply with 1e18 (and not 10e18)
    – rndstr
    Commented Sep 5, 2021 at 1:46
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Accourding to this table:

  • Wei = 10^0 Wei
  • Ada = 10^3 Wei
  • Babbage = 10^6 Wei
  • Shannon = 10^9 Wei
  • Szabo = 10^12 Wei
  • Finney = 10^15 Wei
  • Ether = 10^18 Wei

1 Ether is 1^18 = 1000000000000000000 Wei.

1 Wei is 0.000000000000000001 Ether.

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In javascript it would be wei = eth_amount*10e17. Not *10e18 . e counts as the 10 and *10e18 would multiply your eth by one order of magnitude too many!

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