Basic Calculator
A fast, keyboard-friendly calculator for everyday arithmetic — add, subtract, multiply, divide, and calculate percentages instantly.
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Keyboard shortcuts supported
Frequently Asked Questions
About this calculator
This calculator handles all everyday arithmetic with a clean, responsive interface. It supports full keyboard input so you can type calculations without touching the mouse, making it ideal for quick computations at a desk.
- Four operations — Add, subtract, multiply, and divide any real numbers.
- Percentage — Calculate percentages contextually — 200 + 10% adds 20 (10% of 200), while standalone 50% returns 0.5.
- Keyboard support — Type digits and operators; Enter for equals, Backspace to delete, Escape to clear.
- Chained operations — Chain multiple operations without pressing equals each time — the running total updates automatically.