Old .wb3 spreadsheets from Quattro Pro version 7 and 8 can still be opened in latest version of the program and thus saved to other spreadsheet formats, including Excel's XLS and XLSX formats. This seems like the only real way how to make this conversion work.
Convert Corel Quattro Pro spreadsheet to Microsoft Excel Open XML workbook and spreadsheet.
We found one software available in the database for this conversion.
Microsoft Windows software - convert wb3 to xlsx on Windows
A spreadsheet software application from Corel
Convert from wb3 file format
|Yes, Corel Quattro Pro supports wb3 file conversion as a source file type.||Yes||Yes||wb3 editor||Yes||No||No||No|
|Yes, Corel Quattro Pro supports xlsx file conversion as a target file type.||Yes||Yes||xlsx editor||Yes||No||No||No|
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.