.wk1

File Type Lotus Worksheet IconLotus Worksheet
File Format Proprietary (IBM)
Usage Open manually
Rank ★ ☆ ☆  Uncommon
Description

Spreadsheet created by Lotus 1-2-3, the first major spreadsheet application; contains data organized into rows and cells; Lotus 1-2-3 is part of Lotus SmartSuite, which was acquired by IBM in 1995.

Important: WK1 files can be opened in Microsoft Excel, but some formatting information may be lost in the conversion process; also, WK1 files are no longer supported by Excel 2007 and later.

Open With
Windows

IconIBM Lotus 1-2-3

IconCorel Quattro Pro

IconApache OpenOffice

macOS

IconIBM Lotus 1-2-3

IconPlanamesa NeoOffice

IconApache OpenOffice

Unix

IconApache OpenOffice

IconGnumeric

Updated March 18, 2010
space