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ODS WK1
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Convert ODS to WK1

Can you convert ODS to WK1?
Verified by Adam B.· reviewed by FE Editorial ·updated Jul 5, 2026
QUICK ANSWER
Is it possible to convert ODS to WK1?
No - not a direct conversion.

Export the ODS data as a CSV file from LibreOffice Calc (File > Save As > Text CSV), which was readable by Lotus 1-2-3 and remains the most universal plain-data exchange format. If XLS compatibility is needed, LibreOffice Calc can also save as .xls (Excel 97-2003).

No direct path
Also to WK1: WK4 · WKS · 123

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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Why convert ODS to WK1?

WK1 (Lotus 1-2-3 Release 2 Worksheet) is a proprietary binary record stream introduced in 1985 for DOS-era software. LibreOffice Calc dropped WK1 export support as the format became obsolete; Microsoft Excel never supported writing it. Lotus 1-2-3 was formally discontinued in 2013, leaving no current application that produces new WK1 files; .CSV or XLSX are the recommended alternatives for data exchange.

How to convert ODS to WK1

LibreOffice Calc FREE

Open the .ods file and go to File > Save As > Text CSV (.csv) for the most compatible plain-data export. If the target application accepts XLS, choose Microsoft Excel 97-2003 (.xls) instead.

Microsoft Excel APP

Open or import the .ods data in Microsoft Excel and save as CSV or XLS via File > Save As for the broadest compatibility with older software.

Apache OpenOffice Calc (OpenOffice.org Calc) FREE

Open the .ods file and use File > Save As > Text CSV to export plain values that legacy software can import.

Programs that convert ODS

Microsoft Excel
Apache OpenOffice Calc (OpenOffice.org Calc)
LibreOffice Calc

About these formats

.ODS OpenDocument Spreadsheet

An ODS file is an OpenDocument Spreadsheet, the vendor-neutral format standardized by OASIS in 2005 and used natively by LibreOffice Calc and Apache OpenOffice. You can open it in…

Open .ODS details →
.WK1 Lotus 1-2-3 Release 2 Worksheet

A WK1 file is a spreadsheet created by Lotus 1-2-3 Release 2.x for DOS (1985). Modern Microsoft Excel cannot open it - support was removed in Excel 2007. Use the free LibreOffice Calc or…

Open .WK1 details →

Quality & what to watch

  • No current version of LibreOffice, Excel, or any maintained application writes new .wk1 files.
  • CSV exports only the active sheet as plain values - no formulas, no formatting, and no additional sheets are included.
  • Any site claiming to convert ODS to WK1 online either fails or produces output that cannot be verified with modern tools.

Frequently asked questions

What is WK1 and why does no one support it?
WK1 is the binary worksheet format used by Lotus 1-2-3 Release 2.x on DOS, popular roughly 1985-1993. It was superseded by Excel during the 1990s and Lotus 1-2-3 was formally discontinued in 2013.
Can LibreOffice open WK1 files even though it cannot write them?
Yes - LibreOffice retained a WK1 reader for users with legacy Lotus files but removed the writer because there is no use case for creating new WK1 files.
What format should I use instead of WK1?
CSV for plain data exchange, XLS if the target is an older Excel version, or XLSX for any modern spreadsheet application.