Basic Calculator
Perform basic arithmetic operations: addition, subtraction, multiplication, and division. Supports decimal numbers, percentage calculations, and keyboard input.
How to Use This Calculator
- Click the number buttons to enter your first number.
- Click an operator button (+, −, ×, ÷) to select the operation.
- Enter the second number using the number buttons.
- Press = to see the result. You can continue chaining operations.
- Press C to clear and start over, or use the backspace button to delete the last digit.
Keyboard shortcuts: You can also type numbers and operators directly using your keyboard. Press Enter to calculate and Escape to clear.
Supported Operations
| Operation | Symbol | Description | Example |
|---|---|---|---|
| Addition | + | Add two numbers | 5 + 3 = 8 |
| Subtraction | − | Subtract second from first | 10 − 4 = 6 |
| Multiplication | × | Multiply two numbers | 6 × 7 = 42 |
| Division | ÷ | Divide first by second | 15 ÷ 3 = 5 |
| Percentage | % | Divide current value by 100 | 50% = 0.5 |
Examples
Enter 25 + 17 = 42
Enter 100 − 25 = 75, then × 2 = 150
Enter 250 % = 2.5 (divides by 100)
Frequently Asked Questions
Can I use this calculator with my keyboard?
Yes! You can type numbers (0-9), operators (+, -, *, /), and the decimal point (.) directly. Press Enter to calculate, Backspace to delete, and Escape to clear.
Does this calculator handle decimals?
Yes, this calculator supports decimal numbers. Click the . button or press the period key on your keyboard to enter decimal points (e.g., 3.14).
What is the percentage button for?
The % button divides the current display value by 100. For example, entering 50 then pressing % gives 0.5. This is useful for quick percentage conversions.