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WK4 XLS
Free online converter

Convert WK4 to XLS

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WK4 to XLS converterFREE
Drop a .WK4 file here
or pick one - we convert it to .XLS and give you the file to download

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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How to convert WK4 to XLS

  1. Add your .WK4 file - drop it in the box above or click to browse.
  2. Convert it to .XLS in a few seconds.
  3. Download your new .XLS file.

What to expect

  • Microsoft Excel 2007 and later removed the Lotus import filter - it cannot open .wk4 files directly.
  • Lotus @functions such as @SUM and @IF mostly convert to standard Excel equivalents, but obscure @functions may appear as literal text after conversion - verify formulas.
  • XLS is limited to 65,536 rows; if your spreadsheet is larger, export to .xlsx instead.

Frequently asked questions

Can I open a WK4 file in Microsoft Excel?
Not directly. Excel 2007 and later removed the Lotus 1-2-3 import filter. Convert to .xls or .xlsx using LibreOffice first, then open the result in Excel.
Will my formulas survive the conversion?
Most standard Lotus @functions convert correctly to Excel equivalents. Check any unusual @functions - a few may come through as plain text.
Does WK4 support multiple sheets, and will they carry over?
Yes. WK4 introduced 3D multi-sheet workbooks, and LibreOffice preserves each sheet when saving to .xls.
Should I save as XLS or XLSX?
Choose .xlsx unless you specifically need the older format for a legacy system - XLSX has no row limit and is better supported in modern software.
Learn about the formats: .WK4 · .XLS
Programs that convert WK4: Microsoft Excel · Corel Quattro Pro · LibreOffice Calc · OpenOffice.org Calc