Calculator
Standard calculator with keyboard support and history.
Keyboard works too โ digits, operators, Enter to evaluate, Esc to clear.
About the Calculator
A standard calculator with a full button pad, parentheses, percent and a running history of your last twelve calculations. Keyboard input is supported โ digits and operators type directly, Enter evaluates and Escape clears โ and each result becomes the start of the next expression, just like chaining on a physical calculator.
How to use the Calculator
- Click the number keys or type digits and operators with your keyboard.
- Use parentheses and the % key for grouped or percentage expressions.
- Press = or Enter to evaluate the expression shown above the result.
- Review past calculations in the History box, or clear it when it fills.
Calculator FAQ
Which keys work on the keyboard?
Digits, + - * / . ( ) % type directly, Enter or = evaluates, Backspace deletes the last character and Escape clears everything.
How does the history work?
Every evaluated expression is stored as expression = result, newest first, capped at twelve entries, with a button to wipe the list when you want a clean slate.
What happens on a division by zero?
The result display shows Error instead of a broken value, and your expression stays available so you can correct it.