Arbitrary Precision Math Calculator

v20260428

calculator

This utility evaluates complex arithmetic expressions using arbitrary-precision decimal mathematics. It is specifically designed for scientific, financial, or engineering calculations where standard floating-point arithmetic causes unacceptable rounding errors (e.g., 0.1 + 0.2). Supports addition, subtraction, multiplication, division, exponents, and parentheses.

Math Calculation Arithmetic Precision Scientific Calculator

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Overview

Calculator

Evaluate arithmetic expressions with arbitrary-precision decimal math using big.js.

When to Use

User asks to calculate or evaluate a math expression
Precise decimal arithmetic is needed (avoids floating-point errors like 0.1 + 0.2 = 0.30000000000000004)
Expressions involve parentheses, operator precedence, or exponents

Supported Operations

Operator	Description	Precedence
`+`	Addition	1
`-`	Subtraction	1
`*`	Multiplication	2
`/`	Division	2
`^`	Exponent (right-associative)	3
`()`	Parentheses	Highest

Usage

cd scripts
npm ci || npm install
npm run build
npm run calculate "<expression>"

Examples

Input	Output
`"3 + 2"`	`5`
`"10 / 4"`	`2.5`
`"2 ^ 10"`	`1024`
`"(2 + 3) * 4"`	`20`
`"1 + 4.5 * (3-6) / 5"`	`-1.7`
`"-5 + 3"`	`-2`
`"2 ^ 3 ^ 2"`	`512` (right-associative: 2^9)

Edge Cases

Empty expression: Throws "Empty expression" error
Mismatched parentheses: Throws "Mismatched parentheses" error
Division by zero: big.js throws an error
Exponent must be integer: big.js .pow() requires integer exponents

Limitations

No trigonometric functions (sin, cos, tan)
No variables or symbolic math
Exponents must be integers
No factorial, modulo, or bitwise operators

Info

Category Data Science

Name calculator

Version v20260428

Size 37.13KB

Source Code-and-Sorts/awesome-copilot-agents

Updated At 2026-09-05