This is a straightforward 4-function calculator — addition, subtraction, multiplication, division, plus percentage and sign-flip — built for the moments a quick calculation comes up while you're already in the browser and opening a full calculator app feels like overkill. It supports full keyboard input alongside the on-screen buttons, so number-pad users can work without touching the mouse at all.
Beyond the basic operations, it keeps a running expression display above the result so you can see exactly what you typed before hitting equals, and a one-click copy button for grabbing the result straight to your clipboard. It's deliberately simple rather than scientific, aimed at the fast, everyday arithmetic a calculator gets used for most.
How to Use Calculator
- Click the digit and operator buttons, or type on your keyboard, to build an expression — it's shown above the result.
- Press = or Enter to evaluate; use C/Esc to clear, ± to flip sign, % for percent, and ⌫/Backspace to delete the last entry.
- Click Copy to copy the current result to your clipboard for pasting elsewhere.
- Check the History panel for past calculations, and Clear to wipe it.
Features
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Addition, subtraction, multiplication, division, percentage, and sign flip
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Full keyboard support alongside on-screen buttons
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Expression display shows your calculation before the result
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One-click copy of the result to your clipboard
