Head-to-Head: Big.js vs Decimal.js Analysis


v6.2.1(about 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/big.jsNumber of direct dependencies: 0Monthly npm downloads

Big.js is a JavaScript library that provides arbitrary-precision decimal arithmetic. It allows you to perform precise calculations with decimal numbers, avoiding the rounding errors that can occur with native JavaScript number handling. Big.js supports a wide range of mathematical operations, including addition, subtraction, multiplication, division, and more.

Alternatives: decimal.js

Tags: javascriptarbitrary-precisiondecimalmathcalculation


v10.4.3(10 months ago)

This package is actively maintained.Types definitions are bundled with the npm packageNumber of direct dependencies: 0Monthly npm downloads

Decimal.js is a JavaScript library for precise decimal arithmetic. It provides a reliable and accurate way to perform calculations with decimal numbers, avoiding the common rounding errors and precision issues that can occur with floating-point arithmetic in JavaScript.

Alternatives: bignumber.js, math.js, big.js

Tags: javascriptdecimalarithmeticprecisionmath



Both Big.js and Decimal.js are popular npm packages for performing arbitrary precision arithmetic in JavaScript. Decimal.js is slightly more popular and widely used than Big.js in the JavaScript community.


Both libraries provide support for arbitrary precision arithmetic. Big.js uses a base-10 arithmetic approach, while Decimal.js uses a base-2 arithmetic approach. Decimal.js offers higher precision and more advanced mathematical operations than Big.js.


In terms of performance, Big.js is generally faster than Decimal.js. Big.js is optimized for fast integer and floating-point operations, making it more suitable for performance-critical applications.

Ease of Use

Both libraries have a similar API and are easy to use. However, Decimal.js provides additional functionality like formatting, rounding, and modular arithmetic, making it more convenient for certain use cases.


Big.js has no external dependencies, making it lightweight and easy to integrate into projects. Decimal.js, on the other hand, has a dependency on the BigNumber.js library, which may increase bundle size and introduce additional complexity.


Both packages are compatible with JavaScript and can be used in various environments, including Node.js and browsers. They also both have TypeScript support, providing type declarations for improved development experience and error checking.