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    By Dennis Collin

    AutoCAD_Tip_-_How_to_find_the_version_of_DWG_format_without_using_AutoCAD_-_1.PNG

    AutoCAD tends to update its DWG format every 3 or 4 releases which means sometimes users are unable to open an AutoCAD drawing that was created in a newer version. A question often asked is how I can find out what version of AutoCAD created it without installing a newer build of AutoCAD?

    An answer is to open the DWG file in Notepad and look in the first line of text. The line should read something like.

    AutoCAD_Tip_-_How_to_find_the_version_of_DWG_format_without_using_AutoCAD_-_2.PNG

    Refer to this table to find out what DWG version it is

    • MC0.0 - DWG Release 1.1
    • AC1.2 - DWG Release 1.2
    • AC1.4 - DWG Release 1.4
    • AC1.50 - DWG Release 2.0
    • AC2.10 - DWG Release 2.10
    • AC1002 - DWG Release 2.5
    • AC1003 - DWG Release 2.6
    • AC1004 - DWG Release 9
    • AC1006 - DWG Release 10
    • AC1009 - DWG Release 11/12 (LT R1/R2)
    • AC1012 - DWG Release 13 (LT95)
    • AC1014 - DWG Release 14, 14.01 (LT97/LT98)
    • AC1015 - DWG AutoCAD 2000/2000i/2002
    • AC1018 - DWG AutoCAD 2004/2005/2006
    • AC1021 - DWG AutoCAD 2007/2008/2009
    • AC1024 - DWG AutoCAD 2010/2011/2012
    • AC1027 - DWG AutoCAD 2013/2014/2015/2016/2017
    • AC1032 - DWG AutoCAD 2018/2019/2020/2021/2022

    If the specific version is required do a text string search of a u t o c a d (with spaces between characters) You may need to cycle through a few options.

    AutoCAD_Tip_-_How_to_find_the_version_of_DWG_format_without_using_AutoCAD_-_3.PNG

    If the file needs to be converted to a compatible versions click here to read an earlier post on how to convert drawings without an AutoCAD license.