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.WK4 File Extension

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File TypeLotus 4 Worksheet

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CategoryData Files


This file is saved in a binary format, which requires a specific program to read its contents.


Spreadsheet created by IBM Lotus 1-2-3 (v.4), a spreadsheet program included with Lotus SmartSuite; stores data in cells that are organized into rows and columns; each cell can store static data or a formula, which automatically updates the value displayed in the cell.

More Information

NOTE: Previous versions of Microsoft Excel could import WK4 files, but Excel 2007 and later does not support the WK4 format.

Program(s) that open .WK4 files
Microsoft Windows LogoWindows
IBM Collaboration Solutions
Lotus 1-2-3 WK4 File Converter
Corel Quattro Pro X7
Mac OS X LogoMac
IBM Collaboration Solutions
Lotus 1-2-3 WK4 File Converter
Linux LogoLinux
Updated 8/10/2011