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WK5 File - What is a .wk5 file and how do I open it?

Learn about .WK5 files and view a list of programs that open them.

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What is a WK5 file? A WK5 file is a spreadsheet created by version 5 of IBM Lotus 1-2-3, a discontinued spreadsheet program. It stores information in a grid of rows and columns, including numbers, text, and formulas. WK5 spreadsheets are used in various tasks, such as budgeting, accounting, and general data management.

More Information Business and educational environments widely used Lotus 1-2-3 during the late 1980s and 1990s. The WK5 format allowed users to save complex worksheets with formulas that automatically perform calculations, as well as charts or other structured data. Users could also reuse these files to maintain records over time or share data with colleagues.

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VerifiedVerified by FileInfo.com The FileInfo.com team has independently researched the Lotus 5 Worksheet file format and Mac and Windows apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified. If you would like to suggest any additions or updates to this page, please let us know .

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.WK5 File Extension

Lotus 5 Worksheet

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What is a WK5 file?

A WK5 file is a spreadsheet created by version 5 of IBM Lotus 1-2-3, a discontinued spreadsheet program. It stores information in a grid of rows and columns, including numbers, text, and formulas. WK5 spreadsheets are used in various tasks, such as budgeting, accounting, and general data management.

More Information

Business and educational environments widely used Lotus 1-2-3 during the late 1980s and 1990s. The WK5 format allowed users to save complex worksheets with formulas that automatically perform calculations, as well as charts or other structured data. Users could also reuse these files to maintain records over time or share data with colleagues.

How to open a WK5 file

You can open WK5 files with IBM Lotus 1-2-3. However, the program is discontinued.

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Programs that open WK5 files

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IBM Lotus 1-2-3

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IBM Lotus 1-2-3

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Discontinued

Paid

Category: Data Files

Updated: October 30, 2025

FAQ

What is a WK5 file?↓
A WK5 file is a spreadsheet created by version 5 of IBM Lotus 1-2-3, a discontinued spreadsheet program. It stores information in a grid of rows and columns, including numbers, text, and formulas. WK5 spreadsheets are used in various tasks, such as budgeting, accounting, and general data management.
How do I open a .wk5 file?↓
You can open WK5 files with IBM Lotus 1-2-3. However, the program is discontinued.

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