Math evaluator
Evaluate mathematical expressions safely
TL;DR
What is Math evaluator?
A calculator that evaluates mathematical expressions including arithmetic, trigonometry, logarithms, exponentiation, and constants. Use the button pad or type directly. Results update live as you type, and past calculations are saved to history. Powered by mathjs, which uses its own parser instead of JavaScript eval.
Common use cases
- ‣Quick calculation: evaluate a multi-step arithmetic expression without opening a spreadsheet or IDE
- ‣Trigonometry: compute sin, cos, tan and their inverses using the function buttons
- ‣Formula verification: test a mathematical formula against known inputs before implementing it in code
- ‣Unit conversion: compute compound conversion factors (e.g. km/h to m/s: value * 1000 / 3600)
Frequently asked questions
What functions and constants are supported?
Arithmetic (+, -, *, /, ^), parentheses, sin/cos/tan, sqrt, log (base-10), ln (natural log), pi, e, and more. You can also type expressions directly in the input field for anything not on the button pad.
Is eval used internally?
No. This tool uses the mathjs library, which parses and evaluates expressions using its own parser without calling JavaScript's eval(). This prevents code injection while still supporting complex mathematical expressions.