Online Calculator

Free online calculator for basic math operations. Add, subtract, multiply, divide with keyboard support. No ads, instant results, pure client-side.

About Online Calculator

A clean, fast online calculator for everyday math. Supports keyboard shortcuts (numbers, operators, Enter for =, Escape for AC, Backspace for delete). All calculations happen instantly in your browser — no server, no delay, no data sent anywhere.

Features

100% client-side — calculations never leave your device
Full keyboard support: numbers, +, −, *, /, Enter, Esc, Backspace
Percentage and sign toggle (+/−) support
Decimal precision handling
Responsive design — works great on mobile
No ads, no downloads, instant load

FAQ

Is this calculator free to use?

Yes, completely free. No registration, no ads, no limits.

Can I use keyboard shortcuts?

Yes. Type numbers and operators directly. Press Enter for =, Escape to clear all, Backspace to delete last digit.

Does it handle decimals?

Yes, full decimal support with precision handling for accurate results.

Is my data private?

Absolutely. All calculations happen inside your browser. Nothing is sent to any server.