Calculator
A fast everyday calculator with keyboard support and a calculation history.
Tip: you can type with your keyboard. Enter = equals, Esc = clear.
History
No calculations yet.
How to use
Click the buttons or type with your keyboard, then press "=" or Enter. Supported operations are + − × ÷, parentheses and %. The % key treats the preceding value as a percentage (divides it by 100): 10% of 200 is "200×10%" = 20.
Results are kept in the history list. Click an entry to load its expression again. Up to 50 entries are stored, only in this browser on this device.
Notes
All calculations run in your browser; nothing you type is sent to a server. Division by zero shows an error. For trigonometric or logarithmic functions, use the scientific calculator.
FAQ
Where is the history stored?
Only in this browser's localStorage on your device. It is never sent to a server, and the Clear history button deletes it at any time.
Can I use it with only a keyboard?
Yes. Digits, operators, Enter (=), Backspace (delete one character) and Esc (clear) are all supported.