Calculator

Everyday arithmetic with keyboard controls and an in-session calculation history.

What it does

A focused utility for quick arithmetic. The interface keeps the current number, expression and history together, so you can check the calculation as you go.

• Addition, subtraction, multiplication and division
• Percent, sign change and decimal input
• Keyboard input and reusable calculation history

How to use it

1. Enter a number with the on-screen keys or your keyboard.
2. Choose an operation, enter the second number and press equals or Enter.
3. Review the calculation history or clear the display to start again.

Before you use the result

Designed for everyday arithmetic, not symbolic algebra. JavaScript number precision applies; verify results used for precision-sensitive tasks.