A fast, distraction-free calculator for everyday arithmetic. Use your mouse or keyboard, see your recent calculations and copy results with one click.
How to use the Basic Calculator
- Click the buttons or type numbers and operators (+ − × ÷) on your keyboard.
- Press = or Enter to calculate; press Backspace to delete and Esc to clear.
- Use % for percentages and √ for square roots. Recent results appear in the history.
Keyboard shortcuts
Digits 0–9 and the decimal point, + − * / for operations, Enter or = to calculate, Backspace to delete the last digit, Escape to clear everything, and % for percent.
Order of operations
The calculator respects standard precedence: multiplication and division are evaluated before addition and subtraction, so 2 + 3 × 4 = 14.
Frequently asked questions
Does the calculator work offline?
Once the page has loaded, yes — all calculations happen in your browser.
How does the % key work?
It divides the current number by 100. Typing 200 × 15 % gives 30.