Let's assume one has a private key in a raw hexadecimal format:

# Not a real key

How one would get the corresponding Ethereum account from a UNIX command line?

  • 2
    Does this answer your question? How are ethereum addresses generated?
    – Ismael
    Commented Apr 30, 2020 at 17:20
  • @Ismael It does not answer. This question is specifically about easily callable APIs. I am not interested in math behind it. Commented Apr 30, 2020 at 19:36
  • @MikkoOhtamaa that is not clear from your question, if you are looking for easily callable APIs (e.g. web3.js / ethers.js) then your question should state that.
    – SCBuergel
    Commented May 8, 2020 at 9:09
  • @SCBuergel.eth Thank you. I edited the question. Commented May 8, 2020 at 9:36

2 Answers 2


Option #1:

const util = require("ethereumjs-util");
const address = "0x" + util.privateToAddress(privateKey).toString("hex");

Option #2:

const Web3 = require("web3");
const web3 = new Web3();
const address = web3.eth.accounts.privateKeyToAccount(privateKey).address;

Here is an example how to get it with web3.js and Node REPL.

Assuming you know how to set up a Node environment and install eth-lib package. This package is currently being used as a dependency for web3.js functions.

Open node:


Then start the multi-line editor with the command


And paste in and edit the code:

const privateKey = 'ddc64840388bc5f2bc9d40a29b35ae3c41a8cdf9ee1dfdc5a46414e3db3de2db';
const { Account } = require('eth-lib/lib');
// Note it is very important we add a 0x prefix here,
// as the fromPrivate() accepts anything for the input
// and does very little safety checks for the incoming input
const account = Account.fromPrivate('0x' + privateKey);
console.log("Account for", privateKey, "is", account.address); 

This will output:

Account for ddc64840388bc5f2bc9d40a29b35ae3c41a8cdf9ee1dfdc5a46414e3db3de2db is 0x010335E6E38AeACA85DaeeA22F291f86E64d1DaB

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