Parsing Currency Amount from String in Javascript

Sometimes we might need to parse currency from a string.

A common use case would be the parsing amount from a bank statement.

For such use case, parseFloat could be a good fit.

The way the parseFloat works is that, it'll parse the number from the string and if it encounters any non-numeric characters (even a comma) it'll stop parsing and then return the amount that was parsed up to that point.

parseFloat('123.45 Cr') // 123.45
parseFloat('1,234.56 Cr') // NaN

And here is a helper function for that which takes care of removing non-numeric things from the string.

function parseCurrencyAmount(str) {
  const cleanedStr = str.replace(/[^\d.-]/g, '');
  const amount = parseFloat(cleanedStr);
  return isNaN(amount) ? null : amount;
}

parseCurrencyAmount("$1,234.56"); // 1234.56

parseCurrencyAmount("INR 1,234.56 Cr"); // 1234.56

Happy parsing currency!