Calculator Basic Calculator
Four-function calculator with full keyboard support. No click required.
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Keyboard supported: numbers, +, −, ×, ÷, Enter (=), Escape (C), Backspace.
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About this calculator
A straightforward four-function calculator supporting addition, subtraction, multiplication, and division. It also handles percentages and sign toggling. You can use your keyboard — number keys, operators, Enter for equals, and Escape to clear.
How to use it
- Click buttons or use your keyboard to enter a calculation.
- Press = or Enter to evaluate.
- Press C or Escape to clear everything. CE clears only the last entry.
- ± toggles the sign of the current number. % divides by 100.
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FAQ
- Can I use the keyboard to type calculations?
- Yes — the calculator supports full keyboard input. Type numbers and operators directly.
- Does it support negative numbers?
- Yes — use the +/− toggle button to negate the current value.
- Can I see my calculation history?
- The expression display shows the current operation above the result in real time.