The latest version is Calculon 1.22 - released on November 25, 2007.

Click here to download Calculon!

Mac OS X 10.4 Tiger or later is required.

If you're using Safari, click the download link. When the widget download is complete, it will be automatically unarchived and the "Widget Installer" will appear asking if you want to install Calculon and open it in Dashboard. Click "Install" to open the widget in Dashboard, then click "Keep" to install it.

If you're using a browser other than Safari, click the download link. When the widget download is complete, unarchive it by double-clicking on the "calculon.zip" file. Then double click "calculon.wdgt". The "Widget Installer" will appear asking if you want to install Calculon and open it in Dashboard. Click "Install" to open the widget in Dashboard, then click "Keep" to install it.

Calculon is easy to use, and works pretty much like a regular calculator... the biggest difference is that there are no buttons. To enter numbers, simply type what you want on your keyboard. To execute a calculation press the "=", "return" or "enter" key.

To reset Calculon press the "clear" key or "c" key.

To delete characters in your expression one at a time, press the "delete" key or left arrow key.

You can use the answer from a previous calculation in a new one. For example, suppose you have:
2+2=4

Now type "+6=", and you'll get:
4+6=10

You can also enter extended calculations, including the use of parentheses, such as:
(3+3)*3=18

(note that Calculon uses operator precedence, so multiplication and division are calculated before addition and subtraction. Calculon does not currently support more advanced things like trigonometry functions... although that may be something I'll consider adding in the future.)

In order to support certain keyboard number pads, pressing the "," key enters a "." into the calculator as the decimal point.

Calculon also supports copying and pasting of data. "Command - c" will copy your answer to the clipboard. "Command - v" will paste data from the clipboard to the expression part of the LCD display.

Calculon is "Donation-Ware". You're welcome to use it for free as long as you want... but if you use it all the time, please consider donating a little money. It will help motivate me to keep improving it, and pay for this web server space. Donate now!

Here are some reasons why you should use Calculon:

• two line display is useful - see what you've entered
• it looks nice and you get choice of 10 colors
• takes up less space on your screen than Apple's Calculator
• you never use those buttons on the Apple Calculator widget anyway

1.22 - November 25, 2007

• fixed the URL for the "Info" button since I've moved to a different server
• fixed a CSS error that was causing the wrong font to be displayed when using OS X 10.5 Leopard

1.21 - July 20, 2005

• pressing the "," key now enters a "." for the decimal point - this feature was added to support international keyboards with number pads that have a "," as the decimal point separator (this feature will change if/when I get around to implementing real support for other number formats)

1.2 - July 20, 2005

• added the ability to paste from the clipboard
• added the ability to delete the last character by pressing the "delete" key or left arrow key
• pressing the "c" or capital "C" key now resets the calculator (in addition to the "clear" key) - mainly added this for PowerBook users, since there's no dedicated "clear" key like on full size keyboards
• fixed a bug that was causing characters to be entered twice for PowerBook users using the "fn" key and the pseudo-number pad (keys M,J,K,L,U,I,O, etc.)
• added some checks to prevent users from entering "=" more than once
• typing a number after a calculation has been made now resets the calculator and starts a new calculation (previously, it had a bug where the number would be appended to the end of the old answer)

1.1 - July 15, 2005

• Added support for parentheses

1.0 - July 13, 2005

• Initial release