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Basic Calculator Online

Free online math calculator — click the keys or use your keyboard for instant results.

Use this free basic calculator online to add, subtract, multiply, and divide. Results appear instantly with a short history. Your numbers stay on your device — nothing is uploaded. Prefer the suite overview? Visit the calculator homepage.
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Calculations never leave your browser

How to Use the Free Online Calculator

1

Enter a number

Tap the keypad or type digits on your keyboard. Decimals and negatives are supported.

2

Choose an operation

Select +, −, ×, or ÷, then enter the next number for multi-step math.

3

Get the result

Press = (or Enter). Copy the result, clear history, or keep calculating.

Frequently Asked Questions

Is this basic calculator free to use?

Yes. The Site95 basic calculator is 100% free with no signup, no limits, and no watermarks.

Does my data leave my device?

No. All calculations run in your browser with JavaScript. We never receive your numbers or results.

Can I use my keyboard?

Yes. Type digits, +, -, *, /, Enter for equals, Escape or C to clear, and Backspace to delete.

What operations are supported?

Addition, subtraction, multiplication, division, percent, plus/minus toggle, and decimal numbers.

Can I copy the result?

Yes. Use the Copy result button to place the current display value on your clipboard.

Does it work offline after loading?

Once the page and scripts have loaded, calculations run locally. An internet connection is only needed to open the page initially.

Free Basic Calculator for Everyday Math

Whether you need a quick total, a division for splitting costs, or simple product math, a reliable online calculator is handy on any device. Site95's basic calculator supports the four core operations plus percent, sign toggle, decimals, and a short history of recent results.

Unlike apps that require installs or accounts, this tool runs entirely in your browser. Use it on desktop or mobile whenever you need fast, private arithmetic — completely free.

Common uses

Students check homework answers. Shoppers total prices and discounts. Freelancers estimate simple billable amounts. Anyone can do everyday math without opening a separate app.

Keyboard shortcuts

Digits 0–9, operators + - * /, Enter or = for equals, Escape or C to clear, Backspace to delete, and % for percent.

Looking for more free tools? Try our PDF tools and text tools on Site95.