Standard Calculator
A clean on-screen calculator for quick everyday arithmetic. Click the buttons, or use your keyboard: numbers and the operators + − * / work directly, Enter confirms the result, and Esc clears the display.
How to use this calculator
Type a number, choose an operator, type the next number, then press =. Press C to reset, ± to flip the sign of the current number, and % to convert the current number to a percentage (divide by 100). Chain operations by pressing another operator right after a result — the calculator carries the running total forward, the same way a physical calculator does.
Yes. Numbers, the four operators, Enter (equals), Backspace and Esc (clear) all work.
No. Everything happens locally in your browser's memory and disappears when you refresh or close the tab.
Dividing by zero is undefined, so the display will show an error state — press C to clear and start again.