numeral vs currency.js vs dinero.js vs accounting
Handling Currency and Number Formatting in JavaScript
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Handling Currency and Number Formatting in JavaScript

accounting, currency.js, dinero.js, and numeral are JavaScript libraries designed to handle number formatting and currency operations, but they serve different architectural needs. accounting and numeral focus primarily on string formatting for display, with numeral also offering basic math operations that are not safe for financial calculations. currency.js and dinero.js are built specifically for money, using integer-based math to avoid floating-point errors, with dinero.js offering a more functional and immutable approach. Choosing the right tool depends on whether you need simple display formatting or robust, error-free financial logic.

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numeral2,058,8389,704-3459 years agoMIT
currency.js726,1693,382-615 years agoMIT
dinero.js450,2346,789858 kB235 months agoMIT
accounting364,9314,980-14512 years ago-

Handling Currency and Number Formatting in JavaScript

When building financial features or data dashboards, how you handle numbers matters. Using native JavaScript numbers for money is risky due to floating-point errors (e.g., 0.1 + 0.2 !== 0.3). The packages accounting, currency.js, dinero.js, and numeral attempt to solve this, but they take very different approaches. Some focus only on how the number looks, while others focus on how the math works. Let's compare them based on real engineering needs.

🎯 Core Purpose: Display vs. Calculation

Not all libraries are built for the same job. accounting and numeral are primarily formatters. They take a number and turn it into a string. currency.js and dinero.js are calculation engines that also format. They wrap the value in an object to keep math safe.

accounting is purely for formatting. It does not store state or handle math safely.

// accounting: Format only
import accounting from 'accounting';
const display = accounting.formatMoney(1234.56); 
// "$1,234.56"

currency.js wraps the value so you can chain math and formatting.

// currency.js: Math and Format
import currency from 'currency.js';
const val = currency(1234.56);
const display = val.format(); 
// "$1,234.56"

dinero.js uses integers (cents) to ensure precision during math.

// dinero.js: Math and Format (Integer based)
import Dinero from 'dinero.js';
const val = Dinero({ amount: 123456, currency: 'USD' });
const display = val.toFormat(); 
// "$1,234.56"

numeral is a general number formatter that supports many types (bytes, percentages).

// numeral: Format only (General)
import numeral from 'numeral';
const display = numeral(1234.56).format('$0,0.00'); 
// "$1,234.56"

🧮 Math and Precision: Floating Point vs. Integers

This is the most critical architectural decision. JavaScript numbers are floating-point, which causes rounding errors. dinero.js and currency.js solve this differently.

accounting has no math methods. You must use native JS math, which is unsafe for money.

// accounting: No built-in math
// You must do this manually (UNSAFE for money)
const total = 10.10 + 20.20; 
const display = accounting.formatMoney(total);

currency.js handles the conversion internally. You pass decimals, it stores them safely.

// currency.js: Safe math with decimals
const total = currency(10.10).add(20.20);
console.log(total.value); // 30.30

dinero.js requires you to pass integers (cents). This forces precision at the input stage.

// dinero.js: Safe math with integers
const d1 = Dinero({ amount: 1010, currency: 'USD' });
const d2 = Dinero({ amount: 2020, currency: 'USD' });
const total = d1.add(d2);
console.log(total.getAmount()); // 3030

numeral supports math operations, but uses native floating-point numbers.

// numeral: Unsafe math (Floating point)
const total = numeral(10.10).add(20.20);
console.log(total.value()); // May result in 30.2999999...

🎨 Formatting Flexibility and Localization

Formatting needs vary by region. Some libraries handle localization better than others.

accounting allows custom symbols and separators via options.

// accounting: Custom options
accounting.formatMoney(1234, "€", 2, ".", ",");
// "€1.234,00"

currency.js supports locale options for formatting output.

// currency.js: Locale support
currency(1234.56, { locale: 'de-DE' }).format();
// "1.234,56 €"

dinero.js relies on external libraries (like Intl) for complex localization in V1.

// dinero.js: Basic format
Dinero({ amount: 123456, currency: 'USD' }).toFormat();
// "$1,234.56" (Limited locale support in V1)

numeral uses token-based formatting which is very flexible but manual.

// numeral: Token based
numeral(1234.56).format('0,0.00 $');
// "1,234.56 $"

⚠️ Maintenance and Future-Proofing

Architectural decisions must account for the library's lifespan. Using unmaintained code introduces security and compatibility risks.

accounting is stable but effectively inactive. It works for simple tasks but won't get new features.

// accounting: Stable but legacy
// No recent updates, but API is unlikely to break
import accounting from 'accounting';

currency.js is actively maintained and lightweight.

// currency.js: Active maintenance
// Regular updates and modern JS support
import currency from 'currency.js';

dinero.js V1 is in maintenance mode while V2 is in development.

// dinero.js: Transitioning
// V1 is stable, V2 is a major rewrite (check docs for V2 status)
import Dinero from 'dinero.js';

numeral is unmaintained. The original repo is archived.

// numeral: UNMAINTAINED
// Do not use in new projects. Look for forks or alternatives
import numeral from 'numeral';

📊 Summary: Capabilities at a Glance

Featureaccountingcurrency.jsdinero.jsnumeral
Primary UseCurrency FormattingCurrency Math & FormatFinancial PrecisionGeneral Number Format
Math Safety❌ (Native JS)✅ (Internal handling)✅ (Integer based)❌ (Floating point)
Immutability❌✅✅❌
Maintenance⚠️ Legacy✅ Active⚠️ V1 Maintenance❌ Unmaintained
Learning CurveLowLowHighLow

💡 Final Recommendation

For Financial Logic: Use dinero.js if you need strict precision and can handle the integer-based API. It is the safest choice for banking, accounting, or e-commerce backends. Use currency.js if you need a simpler API for frontend carts or displays where you still want math safety without the verbosity of dinero.js.

For Display Only: Use accounting if you are maintaining a legacy system that already uses it. For new projects requiring only formatting, consider using the native Intl.NumberFormat API instead of adding a dependency.

Avoid: Do not use numeral for currency. It is unmaintained and unsafe for money math. Do not use accounting or numeral for any calculation logic involving money.

Modern Alternative: For simple formatting in new projects, the native browser API is often enough:

// Native Intl API (No dependency)
new Intl.NumberFormat('en-US', {
  style: 'currency',
  currency: 'USD'
}).format(1234.56);
// "$1,234.56"

How to Choose: numeral vs currency.js vs dinero.js vs accounting

  • numeral:

    Avoid numeral for new projects as the original repository is no longer maintained. While it offers flexible formatting for general numbers (percentages, bytes, etc.), it uses floating-point math which is unsafe for currency. Only consider it for non-financial display formatting if you accept the risk of using unmaintained software.

  • currency.js:

    Choose currency.js if you want a balance between ease of use and safety for currency math. It handles floating-point errors internally and offers a chainable API that is easier to learn than dinero.js. It is ideal for e-commerce carts or simple payment flows where you need both formatting and addition.

  • dinero.js:

    Choose dinero.js if you are building a financial application where precision and immutability are critical. It forces you to work with integers (cents) to prevent rounding errors and provides a robust API for allocations and comparisons. It has a steeper learning curve but offers the highest safety for serious money handling.

  • accounting:

    Choose accounting if you need a lightweight, zero-dependency solution strictly for formatting currency strings in legacy projects. It is stable and simple, but lacks modern features like immutable objects or safe math operations. Do not use it for calculating totals or handling complex financial logic.

Similar Npm Packages to numeral

numeral is a JavaScript library designed for formatting and manipulating numbers. It provides a simple and intuitive API for formatting numbers into various styles, such as currency, percentages, and more. This makes it a popular choice for developers who need to present numerical data in a user-friendly manner. While numeral is a robust solution for number formatting, there are several alternatives available that also cater to similar needs. Here are a few noteworthy options:

  • accounting is a lightweight JavaScript library for number formatting and manipulation, particularly focused on financial data. It provides functions for formatting currency, percentages, and numbers with thousands separators. If your application primarily deals with financial data and you need a straightforward way to format and manipulate numbers, accounting is a solid choice. Its simplicity and focus on financial use cases make it an appealing alternative to numeral.

  • d3-format is part of the D3.js library, which is widely used for data visualization. The d3-format module provides powerful formatting capabilities for numbers, including support for custom formats. If you're already using D3 for visualizations or need advanced formatting options, d3-format can be a great choice. It allows for extensive customization and is particularly useful when working with complex datasets that require specific formatting rules.

  • numbro is another library for formatting numbers, inspired by numeral.js. It offers a similar API and supports various formats, including currency, percentages, and more. numbro is designed to be lightweight and easy to use, making it a good alternative for developers looking for a straightforward number formatting solution. Its compatibility with numeral.js means that transitioning between the two libraries can be relatively seamless.

For a detailed comparison of these libraries, check out the following link: Comparing accounting vs d3-format vs numbro vs numeral.

Similar Npm Packages to currency.js

currency.js is a lightweight JavaScript library designed for handling currency calculations and formatting. It provides a simple and intuitive API for performing arithmetic operations on currency values while ensuring precision and accuracy. This makes it an excellent choice for developers working on financial applications, e-commerce platforms, or any project that requires handling monetary values. While currency.js is a robust solution for currency management, there are several alternatives available in the ecosystem. Here are a few notable ones:

  • currency-formatter is a library focused on formatting currency values for display. It allows developers to easily format numbers as currency strings based on locale and currency type. While it does not handle arithmetic operations like currency.js, it excels in providing a straightforward way to display currency values in a user-friendly format. If your primary need is to format currency for presentation rather than perform calculations, currency-formatter is a suitable choice.

  • dinero.js is a powerful library for creating and manipulating monetary values. It provides a comprehensive API for performing arithmetic operations, formatting, and handling currency conversions. Dinero.js is particularly useful for applications that require complex financial calculations, as it ensures precision and supports multiple currencies. If your project involves advanced currency management, such as handling discounts, taxes, or multi-currency transactions, dinero.js is a strong contender.

  • numeral is a library for formatting and manipulating numbers, including currency values. It provides a flexible way to format numbers as currency, percentages, and more. While it is not specifically designed for currency management like currency.js or dinero.js, it offers a versatile solution for general number formatting needs. If your application requires a broader range of number formatting capabilities beyond just currency, numeral is a good option.

To explore how these libraries compare, check out the comparison: Comparing currency-formatter vs currency.js vs dinero.js vs numeral.

Similar Npm Packages to dinero.js

dinero.js is a powerful JavaScript library designed for handling monetary values and currency calculations in a precise and reliable manner. It provides a robust API for creating, manipulating, and formatting currency values, making it an excellent choice for applications that require accurate financial computations. With features like currency conversion, rounding, and formatting, dinero.js helps developers avoid common pitfalls associated with floating-point arithmetic, ensuring that financial calculations are both accurate and easy to manage.

While dinero.js is a strong contender for handling monetary values, there are alternatives worth considering:

  • currency.js is a lightweight library that provides a simple API for currency manipulation and formatting. It focuses on basic arithmetic operations and supports various currency formats, making it easy to use for straightforward financial calculations. If your application requires basic currency handling without the need for advanced features like currency conversion or complex formatting, currency.js is a great option. Its simplicity and ease of use make it suitable for smaller projects or applications with less demanding financial requirements.

To see how dinero.js compares with currency.js, check out the comparison: Comparing currency.js vs dinero.js.

Similar Npm Packages to accounting

accounting is a JavaScript library designed for number formatting and currency manipulation. It provides a simple and intuitive API for formatting numbers, currencies, and percentages, making it a popular choice for developers who need to handle financial data in their applications. While accounting.js is a robust solution for number formatting, there are several alternatives available that also cater to similar needs. Here are a few noteworthy options:

  • currency.js is a lightweight library specifically focused on currency manipulation. It allows developers to perform arithmetic operations on currency values while ensuring precision and accuracy. With features like formatting, conversion, and rounding, currency.js is particularly useful for applications that require extensive currency calculations. If your project primarily deals with currency and you need a library that emphasizes accuracy and simplicity, currency.js is an excellent choice.

  • dinero.js is another powerful library for handling money and currency in JavaScript. It provides a rich set of features for creating, manipulating, and formatting monetary values. With support for multiple currencies, rounding, and currency conversion, dinero.js is ideal for applications that require complex financial calculations. Its immutable design ensures that all operations return new instances, which can help prevent unintended side effects in your code. If your application demands a comprehensive solution for managing money, dinero.js is worth considering.

  • numeral is a library focused on number formatting, providing a flexible and powerful way to format numbers in various ways, including currency, percentages, and custom formats. While it does not have the same level of currency-specific features as currency.js or dinero.js, it is an excellent choice for applications that require versatile number formatting capabilities. If your primary need is to format numbers in different ways without the complexities of currency manipulation, numeral can be a great fit.

For a detailed comparison of these libraries, check out the following link: Comparing accounting vs currency.js vs dinero.js vs numeral.

README for numeral

Numeral.js

A javascript library for formatting and manipulating numbers.

Website and documentation

Travis Build Status

Master Build Status

Develop Build Status

NPM

NPM

#CDNJS

CDNJS

Contributing

Important: Please create your branch from and submit pull requests to the develop branch. All pull requests must include the appropriate tests.

  1. Fork the library

  2. Install grunt

  3. Run npm install to install dependencies

  4. Create a new branch from develop

  5. Add your tests to the files in /tests

  6. To test your tests, run grunt

  7. When all your tests are passing, run grunt dist to compile and minify all files

  8. Submit a pull request to the develop branch.

Formats

Formats now exist in their own files and act more or less as plugins. Check out the bytes format for an example of how to create one.

Locales

When naming locale files use the ISO 639-1 language codes supplemented by ISO 3166-1 country codes when necessary.

Locale translations will not be merged without unit tests.

See the english unit tests for an example.

Changelog

2.0.6

Bug fix: Multi letter currency symbols and spacing

Added: Formatting of numbers with leading zeros

New format: Basic Point

Option: Added scalePercentBy100 (default: true) option to turn on/off scaling percentages

2.0.4

Bug fix: Incorrect abbreviations for values rounded up #187

Bug fix: Signed currency is inconsistent #89

2.0.2

Bug fix: Updated module definitions

2.0.1

Bug fix: Fixed regression for webpack/browserify/rollup

2.0.0

2.0.0 brings a lot of breaking changes and a reorganization of the repo, but also simplifies the api as well as the creating of custom formats.

Breaking change / Feature: All formats are now separate files. This makes it easy to create custom formats, and will also allow for custom builds with only certain formats. (Note: The built numeral.js still contains all formats in the repo).

Breaking change / Feature: All formats and locales are now loaded using numeral.register(type, name, {})

Breaking change: All language now renamed to locale and standardized to all lowercase filenames

Breaking change: The locale function no longer loads locales, it only sets the current locale

Breaking change: The unformat function has been removed numeral().unformat(string) and now happens on numeral init numeral(string)

Breaking change / Feature: Bytes are now formatted as: b (base 1000) and ib (base 1024)

Breaking change: numeral(NaN) is now treated the same as numeral(null) and no longer throws an error

Feature: Exponential format using e+ or e-

Bug fix: Update to floating point helpers (Note: Numeral does not fix JS floating point errors, but look to our tests to see that it covers quite a few cases.)

1.5.6

Bug fix: numeral converts strings to numbers

Bug fix: Null values return same as 0

1.5.5

Contained breaking changes, recommended to use 1.5.6

Bug fix: Switch bytes back to b and change iecBinary to ib, and calculate both using 1024 for backwards compatibility

1.5.4

Contained breaking changes, recommended to use 1.5.6

Tests: Changed all tests to use Mocha and Chai

Tests: Added browser tests for Chrome, Firefox, and IE using saucelabs

Added reset function to reset numeral to default options

Added nullFormat option

Update reduce polyfill

Added Binary bytes

Bug fix: Fixes problem with many optional decimals

1.5.3

Added currency symbol to optionally appear before negative sign / open paren

Added float precision math support

Added specification of abbreviation in thousands, millions, billions

1.5.2

Bug fix: Unformat should pass through if given a number

Added a mechanism to control rounding behaviour

Added languageData() for getting and setting language props at runtime

1.5.1

Bug fix: Make sure values aren't changed during formatting

1.5.0

Add defaultFormat(). numeral().format() uses the default to format if no string is provided

.unformat() returns 0 when passed no string

Added languages.js that contains all languages

Bug fix: Fix bug while unformatting ordinals

Add format option to always show signed value

Added ability to instantiate numeral with a string value of a number

1.4.9

Bug fix: Fix bug while unformatting ordinals

1.4.8

Bug fix: Throw error if language is not defined

1.4.7

Bug fix: Fix typo for trillion

1.4.6

Bug fix: remove ' from unformatting regex that was causing an error with fr-ch.js

1.4.5

Add zeroFormat() function that accepts a string for custom formating of zeros

Add valueOf() function

Chain functionality to language function

Make all minified files have the same .min.js filename ending

1.4.1

Bug fix: Bytes not formatting correctly

1.4.0

Add optional format for all decimals

1.3.4

Remove AMD module id. (This is encouraged by require.js to make the module more portable, and keep it from creating a global)

1.3.3

AMD define() compatibility.

1.3.2

Bug fix: Formatting some numbers results in the wrong value. Issue #21

1.3.1

Bug fix: Minor fix to unformatting parser

1.3.0

Add support for spaces before/after $, a, o, b in a format string

Bug fix: Fix unformat for languages that use '.' in ordinals

Bug fix: Fix round up floating numbers with no precision correctly.

Bug fix: Fix currency signs at the end in unformat

1.2.6

Add support for optional decimal places

1.2.5

Add support for appending currency symbol

1.2.4

Add support for humanized filesizes

1.2.3

Bug Fix: Fix unformatting for languages that use '.' as thousands delimiter

1.2.2

Changed language definition property 'money' to 'currency'

1.2.1

Bug fix: Fix unformatting non-negative abbreviations

1.2.0

Add language support

Update testing for to include languages

1.1.0

Add Tests

Bug fix: Fix difference returning negative values

1.0.4

Bug fix: Non negative numbers were displaying as negative when using parentheses

1.0.3

Add ordinal formatting using 'o' in the format

1.0.2

Add clone functionality

1.0.1

Added abbreviations for thousands and millions using 'a' in the format

1.0.0

Initial release

Acknowlegements

Numeral.js, while less complex, was inspired by and heavily borrowed from Moment.js

License

Numeral.js is freely distributable under the terms of the MIT license.

Copyright (c) 2012 Adam Draper

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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