What is the Calculator?

A clean, fast general-purpose calculator that works entirely in your browser. It supports the four basic operations — addition, subtraction, multiplication and division — along with percentage calculations, sign toggling, and a full calculation history. Fully keyboard friendly so you never need to reach for the mouse.

When would you use it?

Quick arithmetic

Add up expenses, split costs or check a total without switching to another app or reaching for a physical calculator.

Keyboard-driven calculations

Type calculations directly from your keyboard — numbers, operators, Enter for equals, Escape to clear. Faster than clicking buttons.

Reviewing past calculations

Click any entry in the history panel to reload a previous result and continue from there — useful when working through a sequence of calculations.

Percentage calculations

Use the % button to quickly calculate percentage values — for example, 200 × 15% gives you 30.

Frequently asked questions

Numbers 0–9, + - * / for operators, Enter or = for equals, Escape to clear, Backspace to delete the last digit, and % for percentage.

The history stores your last 20 calculations during the current session. History is cleared when you close or refresh the page.

Yes — press the decimal point button or type a full stop on your keyboard to enter decimal numbers.

The calculator displays an Error message rather than crashing or returning an incorrect result.

Keyboard support

Use your keyboard — numbers, operators, Enter for equals, Escape to clear, Backspace to delete.

History

Click any previous result in the history panel to load it back into the calculator.

100% private

All calculations happen locally in your browser. Nothing is sent anywhere.