About this calculator
This calculator handles the everyday math most people need — addition, subtraction, multiplication, division, and percentages — with a running history so you can check your last few calculations without starting over. Everything happens locally in your browser; nothing you type is sent anywhere.
How to use it
- Click the number and operator buttons, or use your keyboard (0–9, +, -, *, /, Enter, Backspace).
- Press % to convert the current value to a percentage of the previous number.
- Press AC to clear everything and start a new calculation.
- Your last calculations stay visible in the log below the keypad until you refresh the page.
Frequently asked questions
Is this calculator free to use?
Yes. There's no sign-up, no usage limit, and no premium tier — it's free for as many calculations as you need.
Does it store or send my calculations anywhere?
No. All the math happens in your browser using JavaScript. Nothing is uploaded or logged on a server.
Can I use my keyboard instead of clicking?
Yes — number keys, the four operators, Enter (for equals), and Backspace all work.