OpalCalc 1.45

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!

Features include:

  • 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 variables and functions (create your own too!)
  • Percentage support
  • Hundreds of measures, like kilograms and feet (create your own too)
  • Extensive date and time support
  • Currency support with conversion (data courtesy of
  • Portable (260k from a pen drive!)
  • Load/save/print support
  • Programmer syntax and functions
  • Custom number base support
  • Advanced notation support
  • Comma decimal point support for Europe, Russia, and South America etc.

What's new in this version:

  • If nothing's selected, Ctrl+C now copies the current answer to the clipboard (or last answer if current is blank).
  • If nothing's selected, Ctrl+X now copies the current sum to the clipboard (or last sum if current sum is blank).
  • The "Prefs -> Autosave prefs on exit" setting is saved after adjustment without the user having to save at that point.
  • As a special case, Opalcalc now handles remainders. Use x/y and then add "rem" on the end (without the quotes). Example: "7/3 rem" would equal "2 rem 1".
  • The 'copy' button now works if any of the output is selected (only input worked before)
  • Printing now remembers the saved margins without needing to open the Page Setup dialog.
  • Added new functions to convert from and to Kelvin: f2k(), k2f(), k2c(), c2k()
  • Added different type of 'cups' as a volume measurement
  • Cursor moves to end of document when opening a file.

Download: OpalCalc 1.45 | 617 KB (Free, paid upgrade available)
Download: Portable OpalCalc | 356 KB
View: Homepage

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