Simple Calculator

Perform basic arithmetic operations (addition, subtraction, multiplication, and division) quickly and easily.

Calculator
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History

No calculations yet

Usage Tips

How to Use the Simple Calculator

Click the number buttons to enter values. Use the operator buttons (+, −, ×, ÷) to perform calculations. Press = to see the result. Press C to clear the display.

Keyboard Support

You can also use your keyboard to enter calculations:

  • Number keys (0-9) - Enter numbers
  • Operator keys (+, -, *, /) - Perform operations
  • Enter key - Calculate result
  • Escape key - Clear display
  • Backspace key - Delete last digit

Calculation History

The last 10 calculations are shown below the calculator. Click on any history item to load it back into the display.

Frequently Asked Questions

Does this calculator store my data?
No. All calculations happen locally in your browser. Your calculations are not stored on any server.
Can I use decimal numbers?
Yes. Click the decimal point (.) button to enter decimal numbers. The calculator supports decimal precision.
What happens if I divide by zero?
Dividing by zero is not mathematically valid. The calculator will display "Error" if you attempt this operation.
Is there a limit to the numbers I can enter?
The calculator can handle numbers up to approximately 15 digits. Very large numbers will be displayed in scientific notation.
Does it work offline?
Yes, once the page loads, all calculations happen locally. No internet connection is required.

Tips & Best Practices

Chaining Operations

You can chain multiple operations together. For example, enter 5 + 3 * 2 and press = to calculate. The calculator follows standard order of operations (PEMDAS).

Using History

Click on any calculation in the history to load it back into the display. This is useful for repeating similar calculations.

Keyboard Efficiency

For faster input, use your number pad if you have one. Most number pads have Enter (same as =), Minus (same as -), Plus (same as +), and * for multiplication.