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
Disclaimer: This calculator performs standard mathematical operations for general and educational use only. We are not a substitute for professional review — for calculations where accuracy is critical, such as financial filings, engineering work, or academic submissions, please verify the result independently.
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.