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# How to Format Currency in ES6

You can now use the NumberFormat instance to format any number into a currency value.

const money = 💰;

// Old Way
money.toLocaleString('en-US',
  {style: 'currency', currency: 'USD'}
); // '$100.00'

// ✅ ES6 Way
new Intl.NumberFormat('en-US',
  { style: 'currency', currency: 'USD' }
).format(money); // '$100.00'

# More Currency Conversion

const money = 10000;

new Intl.NumberFormat('de-DE', {
  style: 'currency', currency: 'EUR'
}).format(money); // '€ 10,000.00'

new Intl.NumberFormat('jp-JP', {
  style: 'currency', currency: 'JPY'
}).format(money); // 'JPÂ¥ 10,000'

new Intl.NumberFormat('zh-CN', {
  style: 'currency', currency: 'CNY'
}).format(money); // 'CNÂ¥ 10,000.00'

# Understanding the Parameter

Let's talk about the parameters. It's made up of the locales and the options object.

new Intl.NumberFormat([locales[, options]])

# A. Parameter: Locales

First, you have the locales, this is the language and region settings. It is made up of language code and the country code.

language code + country code

Let's take a look at some examples:

Ex 1:

en-CA

en = English (language)
CA = Canada (country)

Ex 2:

de-DE

de = German (language)
DE = Germany (country)

Some More example

  • en-IN (English India)
  • fr-CA (French Canada)
  • ja-JP (Japanese Japan)

Here is a list of the Language code: w3schools: Language Codes

Here is a list of the Country code: w3schools: Country Codes

# B. Parameter: Options

There are tons of options, but let's just talk the two that we're using: styles, currency.

Options: Style

The style is the easy part. This is the style for your number formatting. Since this is a currency blog, our choice would be currency. The 3 possible values are:

  • decimal (plain number formatting, the default)
  • currency (currency formatting, what we're using)
  • percent (percent formatting)
const money = 100;

new Intl.NumberFormat('en-CAD', { currency: 'CAD'
  style: 'decimal',
}).format(money); // '100'

new Intl.NumberFormat('en-CAD', { currency: 'CAD'
  style: 'currency',
}).format(money); // 'CA$ 100.00'

new Intl.NumberFormat('en-CAD', { currency: 'CAD'
  style: 'percent',
}).format(money); // '10,000%'

Options: Currency

Obviously there are tons of currency options. You can see the full list here: Current currency & funds code list

Here are some examples:

  • CAD (Canadian dollar)
  • USD (US dollar)
  • EUR (Euro)
  • CNY (Chinese RMB)

# Resources


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