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  • Last update: 3 years ago
  • Total downloads: 160
  • Operating system: WinXP, Win2003, Win Vista, Window2008, Windows 7, Windows XP X64, Windows Vista64, Windows 7 x64, Windows 8, Windows 8 x64
  • Publisher: Daniel White Skytopia (4 other programs)
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windows default iconOpalCalc Publisher's description

OpalCalc is a brand new type of calculator for the PC.

OpalCalc is a brand new type of calculator for the PC. As easy to use as Notepad or a word processor, OpalCalc allows you to insert natural language as part of the sum, along with multi-line support so you can go back and adjust your previous calculations. Want a tiny footprint on the screen for a single sum? Resize accordingly. Want it to fill the screen for heavy-duty work? OpalCalc can adapt.

Featuring a lightweight footprint, on-the-fly calculation as you type, percentages, variable support, hundreds of units and functions, extensive notation support, intuitive design/documentation and much more. Once you've tried it, you'll never want to go back to your ordinary desktop (or PC) calculator again!


Lightweight footprint (only 600k)
Multiline support (notepad style)
Configurable GUI with colour schemes
Built-in 'Quickstart' tutorial
Full colour coding
Multiple undo/redo, zoom in/out, etc.
Numerous built-in functions
Percentages & hundreds of measures
Currency support with conversion
Portable (260k from a pen drive!)
Custom variables and functions
Programmer syntax and functions
Custom number base support
Advanced notation support

What's New in This Release:

Even as the developer, I use OpalCalc quite a lot, and it's the day to day work which helps me to find quicker and simpler ways of improving OpalCalc. One such example is the "Zero orphan variables" feature (Ctrl+=) which allows you to clear all variable assignments ready for you to input new values (without constant backspacing). In 1.61, this is improved further.

Option to allow toggling of the "Main" toolbar for a cool minimalist look. Use with caution, as the only way to get it back again is press F2 (or Ctrl+F4). Thanks to Bernd K for suggesting this!
Saved (stored) user variables which are percentages now work properly.
Option to allow just one instance of OpalCalc. This can allow you to bind OpalCalc to the Calculator button on the keyboard etc.
Size of text cursor on bootup is now correct (and immediate pastes into the window are smoother, without the 'flash' from before).
You can now override the default angle mode setting on a line basis. For example, "sin(50) as gradian" = 0.70710678.
The "Zero orphan variables" feature now removes the "0" value in the document completely (leaving just "n = " for example), ready for immediate value replacement by the user (the value is still automatically set to 0 behind the scenes however).
Installer now checks again with the user to see if they want .NET installed (if they don't have it).

System Requirements:

.NET 3.5 or higher
Program Release Status: Minor Update
Program Install Support: Install and Uninstall

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