Calculator is an extension for Mozilla and Firefox. It has an interface similar to Microsoft Powertoy Calculator. And it's a great open source replacement to the calculator included in Windows accessories.

Features

• History of calculations
• Many conversion functions
• Print calculations
• Easy to use interface
• Many functions

Lastest changes

https://addons.mozilla.org/en-US/firefox/addons/versions/1194

FAQ

• I get a pop up from Superfish, Window Shopper or Similar Products. How can I remove the pop ups?

You can disable those pop ups on the extension preferences page.

• What is wrong with %, it's not working?

The % is not percentage but the modulo operator. For more info on this operator, modulo.

• Is it possible to enter a comment next to an expression?

You can enter a comment using ":" or "//" after an expression. Try "8 + 13 : Fibonacci for 8"

• I am getting some precision problems on some simple expressions, what's up?

Calculator uses javascript to calculate expressions. In javascript, all numbers are represented with floats. This means that numbers are not exact and it might cause problems like 1.1+1.1 = 2.1999999

• Where is the version compatible with Firefox 3.5?

You can find the latest version here https://addons.mozilla.org/en-US/firefox/downloads/file/61924/calculator-1.1.14-fx+sm.xpi it is not available on the official page yet because it is being reviewed.

• How can I create a shortcut on my desktop (XP) or in start menu to launch Calculator directly?
1. Create a text document on your desktop
2. Rename it "calculator.bat"
3. Right click it and select "edit"
4. Copy the line below in the file and save the thing: "c:\Program Files\Mozilla Firefox\firefox.exe" -chrome "chrome://calculator/content/calculator.xul"
5. You can now open the calculator by double clicking "calculator.bat"