Calculator

Basic
Scientific
Percentage

Basic

Tip: keyboard supported (digits, + - * / Enter Backspace)

Basic Calculator

The Basic Calculator handles everyday arithmetic - addition, subtraction, multiplication, and division - in a clean, distraction-free layout that works with both your mouse and your keyboard.

What you can do with it

This is the online equivalent of the pocket calculator you reach for a dozen times a day: totalling a shopping list, splitting a bill, checking a discount, or verifying a quick sum. Numbers, the four core operators, a decimal point, percent, and clear keys are all a single click - or key press - away.

Keyboard-friendly by design

You can type digits and operators directly, press Enter or = to evaluate, and Esc or C to clear. Because the whole calculation runs in your browser, there is no lag and nothing you type is sent anywhere.

Need more power? Switch to the Scientific Calculator for trigonometry and logarithms, or the Percentage Calculator for discounts and percentage change.

Frequently Asked Questions

Can I use my keyboard with this calculator?

Yes. Type numbers and operators directly, press Enter or the equals key to calculate, and press Escape or C to clear the display.

Does the calculator follow order of operations?

The basic mode evaluates entries sequentially like a standard pocket calculator. For full order-of-operations (BODMAS) expressions, use the Scientific Calculator mode.

Is there a limit to how large a number I can enter?

You can work with very large and very small numbers; extremely large results are shown in standard floating-point notation as your browser handles them.

Do I need to install anything?

No. It runs entirely in your web browser with no download, plugin, or account required.