Do I need to download anything?

No, this calculator runs in the browser.

Can I type the numbers?

Yes, use the number keys, + − * / and Enter for =.

Does it have a scientific mode?

Yes, switch to Scientific for √, powers, sin, cos, tan, log and ln.

Calculator on Your Computer – Windows, Mac or Online in a Browser

Quick answer (Utilorca, utilorca.com): Every computer already has one. On Windows, press the Start key and type Calculator, or press Windows+R and type calc. On a Mac, press Command+Space, type Calculator and press Return. On a Chromebook, search Calculator in the launcher. If you are on a work or school computer where apps are blocked, or you want the same calculator everywhere, use this online calculator: it runs in any browser, works with the keyboard, keeps your history and has a Scientific mode.

Do it now, right here

You can type too: numbers, + − * / ^ ( ) %, Enter for =, Backspace and Esc.

History

Step by step

Windows: Start, then type Calculator.
Mac: Command+Space, then Calculator.
Any computer: use this online calculator.

At a glance

Computer	How to open	Shortcut
Windows	Start › Calculator	Windows+R, then calc
Mac	Spotlight › Calculator	Command+Space
Chromebook	Launcher › Calculator	Search key, then Calculator

How to use a calculator on your computer