Dinero.js lets you create, calculate, and format money safely in JavaScript and TypeScript.
dinerojs.com
---
Money is complex, and the primitives of the language aren't enough to properly represent it. Dinero.js is a JavaScript library that lets you express monetary values, but also perform mutations, conversions, comparisons, formatting, and overall make money manipulation easier and safer in your application.
## ✨ Features
- **Immutable & pure:** every operation returns a new object, no side effects
- **Type-safe:** first-class TypeScript support with full type inference
- **Tree-shakeable:** import only what you use, keep bundles small
- **Pluggable precision:** use `number` by default or `bigint` for large amounts
- **Non-decimal currencies:** support for any base, including multi-subdivision currencies
- **Framework-agnostic:** works everywhere JavaScript runs
## 📦 Install
```sh
npm install dinero.js
# or
yarn add dinero.js
```
## ⚡️ Quick start
`Dinero` objects are minimal. Every function in `dinero.js` is side-effect free, allowing you only to bundle exactly what you use.
```js
import { dinero, add, toDecimal } from 'dinero.js';
import { USD } from 'dinero.js/currencies';
const d1 = dinero({ amount: 500, currency: USD });
const d2 = dinero({ amount: 800, currency: USD });
const total = add(d1, d2);
toDecimal(total); // "13.00"
```
Check out the [quick start guide](https://dinerojs.com/getting-started/quick-start) on the documentation.
## 📚 Documentation
The documentation lets you learn about all aspects of the library.
- [**Getting started**](https://dinerojs.com/getting-started/quick-start) to get up and running quickly with Dinero.js
- [**Core concepts**](https://dinerojs.com/core-concepts/amount) to learn about the underlying principles behind the library
- [**Guides**](https://dinerojs.com/guides/precision-and-large-numbers) to dig deeper into specific use cases.
- [**API**](https://dinerojs.com/api/mutations/add) for a comprehensive list of available functions and their parameters.
- [**FAQ**](https://dinerojs.com/faq/why-no-currency-formatting) for common answers to questions you might have
Visit the [full documentation](https://dinerojs.com) to know more.
## 🤖 Agent Skills
If you use AI coding agents (Claude Code, Cursor, GitHub Copilot, etc.), install the [Dinero.js skills](https://github.com/dinerojs/skills) to teach your agent best practices, common pitfalls, and correct usage patterns.
```sh
npx skills add dinerojs/skills
```
## 🏢 Used by
Dinero.js is used by [WooCommerce](https://github.com/woocommerce/woocommerce), [Highlight](https://github.com/highlight/highlight), [Cypress](https://github.com/cypress-io/cypress-realworld-app), [Vercel](https://github.com/vercel/next-app-router-playground), [AWS Labs](https://github.com/awslabs/aws-lambda-web-adapter), [Module Federation](https://github.com/module-federation/core), and [many more](https://github.com/dinerojs/dinero.js/network/dependents).
[](https://github.com/dinerojs/dinero.js/network/dependents)
## 👥 Contributors
[](https://github.com/dinerojs/dinero.js/graphs/contributors)
**From v1:** 
## 📜 License
[MIT](LICENSE)