How to convert currency string to floating point number using Javascript

Question

I have a textbox that will have a currency string in it and I need to convert that string to a double precision float to perform some operations.

"$1,100.00" → 1100.00

This needs to be done on the client side. I have no choice but to keep the Currency string as input, but need to cast it to a double precision float for some math operations.

Answer 1

accounting.js is a good choice. I'm using it on a project and had a very good experience using it.

accounting.formatMoney(4999.99, "€", 2, ".", ","); // €4.999,99
accounting.unformat("€ 1.000.000,00", ","); // 1000000

You can find it on GitHub.

Answer 2

Remove all non-decimal points/digits:

var currency = "-,400.50";
var number = Number(currency.replace(/[^0-9.-]+/g,""));