Currency format

2 snippets in JavaScript

Also written as format currency

JSJavaScript

Formatting Decimals

syntax

num.toFixed(digits)
num.toPrecision(precision)

example

const total = 29.5;
console.log(total.toFixed(2));       // "29.50"
console.log((0.1 + 0.2).toFixed(2)); // "0.30"

const big = 123456.789;
console.log(big.toPrecision(6));     // "123457"

Note toFixed() returns a STRING, not a number. Wrap in Number() or use + to convert back: +total.toFixed(2)

Locale Number Formatting

JS · Numbers & Math

syntax

new Intl.NumberFormat(locale, options).format(n)

example

const price = 1234567.89;
console.log(new Intl.NumberFormat("en-US", {
  style: "currency", currency: "USD"
}).format(price));
// "$1,234,567.89"

console.log(new Intl.NumberFormat("de-DE").format(price));
// "1.234.567,89"

Note Intl.NumberFormat handles thousands separators, currency symbols, percentages, and units correctly for any locale.