The Standard Calculator handles all your everyday arithmetic in one clean interface. Click the buttons or use your keyboard for addition, subtraction, multiplication, division, percentages and sign changes — with a clear running display.
A simple calculator that just works
Sometimes you just need a quick, no-nonsense calculator. This standard calculator covers the four basic operations plus percentage and sign toggle, with a large readable display and a clean keypad that works equally well on desktop and mobile.
Full keyboard support means you can type digits and operators directly, press Enter to evaluate, Backspace to delete and Escape to clear — no mouse required.
Features
- Add, subtract, multiply and divide
- Percentage and plus/minus sign toggle
- Keyboard shortcuts for every key
- Copy the result to your clipboard in one click
- Runs entirely in your browser, even offline
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