Calq
Calq is an easy to use, on demand calculator. The idea behind Calq is to have a calculator handy when you need to do some basic calculations quickly. It’s there when you need it, and it’s not in the way when you don’t need it.
It is available for both Mac OS X Tiger / Leopard and Windows XP / Vista.
Download for Mac | Download for Windows
Calq is freeware, but donations to support my software development are welcome. So if you like Calq, please consider making a donation through paypal. To do so, click on the paypal button below which will take you to the secure donation site.
How it works
The intended way to use Calq is by adding it as a startup item in your account preferences. But off course you can also start Calq by double-clicking the icon. The first time you start Calq you will be presented with a little welcome message, and after that the preference window is shown, so you can set it up to your liking. After confirming the preferences by clicking OK, you notice is that nothing seems to happening, because no icon appears in the dock. But don’t worry, Calq is now sitting in the background waiting to be activated when you need it.
After Calq is started, you can activate it by using a hotkey combination. When Calq is activated it will present a small window that allows you to do calculations through the keyboard. The window will stay up as long is keyboard activity is sensed. If you don’t type anything for a few seconds Calq will hide itself again until you activate it again. Calq will also hide itself immediately if you activate another application.
What it looks like
The following screenshots gives you an idea of what this looks like.
Info on the different versions
| Mac OS X | Windows | |
| Current version | 1.4.6 | 1.3.1 |
| Release date | January 25, 2009 | October 23, 2005 |
| Languages | English, Nederlands, Hungarian | English |
| System requirements | Mac OS X 10.4 or higher | Windows 2000 or Windows XP .NET framework 1.1 |
| Known problems | None | F12 hotkey doesn’t work |
| License | Freeware | Freeware |
| Download | Click to download Calq for OS X | Click to download Calq for Windows |
If there is a problem with the download link, then please let me know: info@katoemba.net.


I would love it if I could use the Num Lock key on my PC keyboard that I use with my iMac to clear the calculator like I’ve done for the past 5 years with the default OS X Calculator app. The hotkey for activating the application is customizable (although it won’t take Cmd+Alt, maybe due to OS limitations), but the key to clear and do other things is on a fixed list which makes sense except in this case. I tried the “Clear” button, but that doesn’t work like it does in Calculator.app. I guess because I have a PC keyboard?
The software is really helpful.Thanks for providing this info.
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Aberlutely Nice! Thanks!
I couldn’t bring up the app once installed. Using option or cntrl or shift C (i thought the weird symbol in the setup prefs was option) didn’t bring up the app.
The default shortcut is Cmd-Alt-C. You can also open the calculator (or preferences) from the += sign in the menubar.
This is a fabulous niche product. I use it constantly. It’s now one of the first things I install when setting up a new system.
Me too! I love it, and keep a copy on my flash drive (and a number of network drives) so I can always have it.
Me too!!
Very neat. I like it.
Tiny and wonderful software, Always a calculator handy on shortcut.
Its really good software. i am using mac and its easy to use.