mathjs

Extensive mathematics library for JavaScript and Node.js — expression parsing, symbolic algebra, matrix operations, units, and statistics.

mathjs

General JS

Extensive mathematics library for JavaScript and Node.js — expression parsing, symbolic algebra, matrix operations, units, and statistics.

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Bundle (gzip)

196.8 kB

729.1 kB raw

Install size includes transitive dependencies. Bundle size is gzipped browser payload.

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The Problem

JavaScript's native Math object covers basic trigonometry but lacks fractions, complex numbers, matrix operations, unit conversions, expression parsing, and symbolic computation needed for scientific and financial applications.

What It Does

Math.js evaluates mathematical expressions from strings (useful for formula builders and spreadsheet-like features), performs symbolic differentiation, handles fractions and complex numbers without floating-point loss, supports matrix/tensor operations, and converts between physical units.

Installation

bash
npm install mathjs

Usage Example

typescript
import { evaluate, derivative, unit, matrix } from 'mathjs';

// Evaluate expressions from user input
evaluate('sqrt(16) + 2^3');            // 12
evaluate('sin(pi / 4)');               // 0.7071...

// Symbolic differentiation
derivative('x^2 + 3*x', 'x').toString(); // '2 * x + 3'

// Unit conversion
unit('5 km').toNumber('mile');          // 3.107...

// Matrix operations
matrix([[1, 2], [3, 4]]);
evaluate('inv([1, 2; 3, 4])');

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