Simple Calculator

A clean, easy-to-use online calculator for basic arithmetic. Perform addition, subtraction, multiplication, and division instantly.

Use your keyboard: 0-9, +, -, *, /, Enter, Backspace, Esc

How to Use This Tool

Enter the first number using the on-screen buttons or your keyboard.
Choose an operation: addition (+), subtraction (−), multiplication (×), or division (÷).
Enter the second number.
Press = or Enter to see the result. Chain more operations by pressing another operator right after.
Use AC or Esc to clear everything, or Backspace/← to remove the last digit.
Click any entry in the History panel to reload that calculation and result.

Formula & How It Works

Addition

Result = A + B

Adds the second number to the first.

Subtraction

Result = A − B

Subtracts the second number from the first.

Multiplication

Result = A × B

Multiplies the two numbers together.

Division

Result = A ÷ B

Divides the first number by the second; dividing by zero shows an error.

Practical Examples & Common Use Cases

Example: 45 + 78

45 + 78 = 123.

Example: 12 × 9

12 × 9 = 108.

Example: 150 ÷ 4

150 ÷ 4 = 37.5.

Frequently Asked Questions

Can I use keyboard shortcuts?

Yes! Use number keys (0-9), operators (+, -, *, /), Enter or = to calculate, Backspace to delete, and Esc or C to clear.

Does this calculator follow order of operations?

This simple calculator evaluates operations sequentially from left to right as you enter them. For order-of-operations (PEMDAS), use our Scientific Calculator.

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