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Convert WK3 to XLS Online


1) Upload WK3 file to convert

 

Drop files here, or Click to select
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Allowed file types: fasta, qif, ofx, iif, srt, ics, excel, ris, bib, ods, xls, xlsx, xlsm, csv, tsv, tab, xlsb, xltx, xlr, pxl, qpw, wb3, wq1, dbf, wk3, 123, mdb, evtx, pages, numbers, sqlite

2) Set converting WK3 to XLS options

Convert to

 

Options

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3) Get converted file

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How to convert WK3 to XLS?

1

💾 Upload Your File: Go to the site, click on «Upload File,» and select your WK3 file.

2

✍️ Set Conversion Options: Choose XLS as the output format and adjust any additional options if needed.

3

Convert and Download: Click 👉«Download Converted File»👈 to get your XLS file.

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Cloud Based
Convert WK3 to XLS without installing Excel or a spreadsheet app. Upload the file in your browser and download the XLS on Windows, Mac, or mobile.
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Secure
Spreadsheets can contain names, figures, and contact details. Your WK3 upload is encrypted in transit with HTTPS/TLS and processed in data centers with multi-factor access control during the conversion to XLS.
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Ease of Use
Converting from WK3 to XLS has never been so simple. Our intuitive interface lets you convert files in just a few clicks.
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Privacy
The contents of your WK3 are never inspected or reused. After the conversion to XLS, both files are deleted automatically from our servers. Privacy Policy.

 

WK3 File

File extension .WK3
Category File
DescriptionWK3 is a legacy spreadsheet format used in Lotus 1-2-3. It supported basic tabular structure, formulas, and charts in DOS/Windows.
Associated programsLotus 1-2-3, Microsoft Excel (old version), LibreOffice Calc
Developed byLotus Software (IBM)
MIME typeapplication/vnd.lotus-1-2-3
Useful linksMore detailed information on WK3 files
Conversion typeWK3 to XLS

XLS File

File extension .XLS
CategoryDocument File
DescriptionXLS is the most popular format for storing table data. It is native Microsoft Excel format with data stored in numbered cells that form columns and rows. The top line and left column of each table contains numbering of each cell that can contain either static or dynamic data that is calculated from formulas. XLS features powerful calculation and charts-building options, as well as rich text formatting. XLS is compatible with numerous table editors such as Calc, PlanMaker, OpenOffice, etc.
Associated programsMicrosoft Excel
Microsoft Excel Viewer
OpenOffice
Developed byMicrosoft
MIME typeapplication/vnd.ms-excel
Useful linksMore detailed information on XLS files
Rating WK3 to XLS   5 star WK3 to XLS   4.9 (2220 votes)
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WK3 to XLS Converter — Frequently Asked Questions ▼

What is a WK3 file?

WK3 is a spreadsheet format created by Lotus Development Corporation for Lotus 1-2-3 version 3.x (released in 1989). It stores cells, formulas using Lotus 1-2-3 syntax, named ranges, and basic formatting in a binary file. WK3 was a dominant business spreadsheet format in the late 1980s and early 1990s before Microsoft Excel became the industry standard. Most modern spreadsheet applications no longer open WK3 files natively.

Which Lotus 1-2-3 formula functions convert correctly to XLS?

Core arithmetic formulas and most standard financial/statistical functions (SUM, AVG, MIN, MAX, IF, PMT, NPV, etc.) convert to their Excel equivalents. Lotus-specific functions like @-prefix notation (@SUM, @IF) are translated to Excel's standard syntax (SUM, IF). A small number of Lotus-only functions with no Excel equivalent may appear as literal values or error cells in the XLS output — review the converted file for #NAME? errors.

Are named ranges from the WK3 file preserved in XLS?

Yes. Named ranges defined in the WK3 file are carried over to the XLS output as Excel-compatible defined names. Formulas that reference those named ranges will continue to work correctly in Excel after conversion. If a range name uses characters that are illegal in Excel (spaces, special characters), it may be modified slightly during conversion.

Does the converter handle multi-sheet WK3 workbooks?

Lotus 1-2-3 version 3 introduced multi-sheet workbooks. If your WK3 file contains multiple worksheets, the converter maps each sheet to a corresponding tab in the XLS output. Sheet references in formulas (e.g., A:A1 referring to sheet A, cell A1 in Lotus notation) are translated to Excel's inter-sheet reference syntax.

What is the file size limit for the online converter?

The online converter accepts WK3 files up to 50 MB per upload, one file at a time. Lotus 1-2-3 WK3 files from the early 1990s are almost always under 1 MB — even large business models with thousands of rows are compact by modern standards — so the 50 MB limit is effectively no constraint for legacy WK3 files.

Can I batch convert an archive of old Lotus 1-2-3 WK3 files to XLS?

The online tool converts one file at a time. For migrating an entire legacy archive, use the desktop Total Excel Converter: TotalExcelConverter.exe C:\LotusArchive\*.wk3 /xls /out C:\XLS\. It runs on Windows 7–11, supports /subfolders for directory trees, and can output to XLSX (Excel 2007+) format as well. Batch conversion of thousands of WK3 files from a corporate legacy migration is a typical use case.
 

 

WK3 to XLS Online Converter

The WK3 to XLS online converter is an essential tool for anyone needing to convert Lotus 1-2-3 spreadsheets into Microsoft Excel format. This conversion process is crucial because it allows users to work with legacy data in a more modern and versatile environment. The WK3 file format, once popular in spreadsheet applications, is outdated and not supported by most current software. By converting these files into XLS format, users can leverage Excel's advanced features and improved accessibility.

One of the key benefits of using this converter is its simplicity and efficiency. The tool is designed to perform conversions quickly without requiring any software installation. By specifically targeting the nuances between WK3 and XLS formats, this converter ensures high-quality data preservation, maintaining both the structure and content integrity.

This online tool stands out from others due to its ease of use and its commitment to user privacy. No files are stored on the server, and the conversion process is completed within moments. This specificity and focus make it an invaluable resource for professionals who manage legacy data but require modern software capabilities. With the WK3 to XLS online converter, transitioning between formats is seamless, allowing users to focus on productivity and data analysis rather than technical barriers.

Feature Online Converters CoolUtils Desktop Excel Built-in Other Software
Batch Conversion Limited ✅ Unlimited Manual only Limited
File Size Limit 1-5MB ✅ No limits System dependent Varies
Privacy & Security Upload required ✅ 100% offline ✅ Local only Varies
Conversion Speed Internet dependent ✅ Fast local processing Slow Medium
Advanced Options Basic ✅ Full customization Limited Basic
Cost Free/Premium One-time purchase Requires Office Subscription
Formatting Preservation Good ✅ Excellent Good Varies
Multiple Formats Support Limited ✅ 40+ formats Few formats Limited

Convert to XLS

Using CoolUtils, it is possible to convert a variety of other formats to XLS files:

                                                                                                 

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