Head-to-Head: Bn.js vs Currency.js Analysis


v5.2.1(over 1 year ago)

This package was last published over a year ago. It may not be actively maintained.Types definitions are provided via a separate npm package: @types/bn.jsNumber of direct dependencies: 0Monthly npm downloads

bn.js is a JavaScript library for arbitrary-precision decimal arithmetic. It provides a set of functions for performing mathematical operations on large numbers with precision up to 2^53 bits. bn.js is commonly used in cryptographic algorithms, financial calculations, and other applications that require precise numerical computations.

Alternatives: big.js, decimal.js, mathjs

Tags: javascriptarbitrary-precisiondecimalmathematicscryptographic


v2.0.4(over 2 years ago)

This package was last published over a year ago. It may not be actively maintained.Types definitions are bundled with the npm packageNumber of direct dependencies: 0Monthly npm downloads

Currency.js is a lightweight library for working with currency values in JavaScript. It can parse, format and perform calculations with currencies, ensuring that you always have accurate and localized results. Currency.js works with a variety of currencies and has robust rounding and precision options. It is built to be compatible with other libraries, making it a versatile option for any project.

Alternatives: big.js, accounting.js

Tags: javascriptlibrarycurrencyparsingformatting



Both bn.js and currency.js serve different purposes. bn.js is a powerful library for working with big numbers and performing precise arithmetic operations. It is commonly used in cryptography, financial calculations, and other scenarios that require precise decimal calculations. On the other hand, currency.js is specifically designed for working with currencies and provides features like currency conversion, formatting, and arithmetic operations.


bn.js is widely used in the JavaScript community, particularly in projects that involve cryptography or financial calculations. It is a core dependency of many popular libraries like Web3.js. currency.js is also popular and has gained a significant following, especially among projects that deal with currency-related operations.

API Design

bn.js provides a low-level API that allows developers to perform complex mathematical operations on big numbers with high precision. It is designed to work seamlessly with the JavaScript Number primitive and follows the BigInteger specification. On the other hand, currency.js provides a more user-friendly and intuitive API that simplifies currency-related operations. It includes methods for formatting, parsing, and performing arithmetic operations on currencies.


bn.js focuses on providing a robust set of mathematical operations for working with big numbers. It supports addition, subtraction, multiplication, division, modular arithmetic, exponentiation, and more. It also provides additional features like comparison, bitwise operations, and prime number generation. On the other hand, currency.js specializes in currency-related features such as currency conversion, formatting, and rounding. It supports various currency formatting options, provides exchange rate fetching, and allows precise arithmetic with currencies.


bn.js is optimized for performance and is designed to handle extremely large numbers with efficiency. It uses optimized algorithms and techniques to achieve high performance in mathematical operations. currency.js, as it primarily deals with currency conversions and arithmetic, also provides good performance but its focus is not on handling extremely large numbers like bn.js. Performance considerations may vary depending on the specific use case.

Community and Maintenance

Both bn.js and currency.js are actively maintained and have a supportive community. They receive regular updates and bug fixes. bn.js is maintained by the OpenSSL project and has a robust community of contributors. currency.js is maintained by a dedicated team and has an active GitHub repository where issues and feature requests are addressed.