Simple Calculator
Free online calculator — fast, clean, fullscreen-ready.
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About this Simple Calculator
Our simple online calculator is designed to be the fastest, cleanest calculator on the web. No cluttered menus, no forced sign-ups, and absolutely no ads interrupting your work.
Keyboard shortcuts
Use your keyboard for even faster input: number keys (0–9), operators (+, -, *, /), Enter for equals, Escape to clear, and Backspace to delete the last digit.
Fullscreen mode
Click "Fullscreen" above to expand the calculator to fill your entire screen — perfect for use on large monitors, in presentations, or when you need total focus.