dwg version

Often, downloaded drawings or drawings sent by others will be prompted with a version too high when opened in AutoCAD.

At this time, we need to convert the drawings to a lower version before we can continue to use them in the current version of CAD.

Tip 1: Installing AutoCAD 2018 can open all current versions of CAD drawings

Tip 2: Because converting a drawing to an earlier release format may cause some data loss, we recommend that you assign a different file name to avoid overwriting the current drawing file.

The following are several ways to convert drawings. (Without Latest AutoCAD)

DWGSee DWG Viewer

The latest version of DWGSee can open all versions dwg files, open the dwg file and then click “Save as” button, give the new drawing file a name and from the drop down menu of the “Save as type”, select DWG or DXF format and the CAD version. Choose where you want to keep the new drawing file and click “OK”.

If you just need open dwg file, you can just use DWGSee Free DWG Viewer, there’s no need convert the drawing again.

AutoDWG DWG DXF Converter

With AutoDWG DWG DXF Converter, you may change versions of DWG and DXF both from low to high and high to low between AutoCAD R12 and Auto CAD 2024, it supports batch conversion.

DWG TrueView

Download and install the latest version of DWG TrueView (a free Autodesk file viewing software) and use the DWG Convert feature to convert the drawing.

  1. Create a copy of the drawing file to be converted.
  2. Launch DWG TrueView.
  3. Click the application menu in the upper-left and choose DWG Convert (or pick it on the ribbon if a file is open).
  1. Add the file(s) in the Files Tree list (click the green plus Add Files button).
  2. Choose the appropriate file format version.
  3. Click Convert.

Note: AutoCAD itself has the DWGCONVERT command for batch-converting files to older formats.

Free Online Conversions

Many Online Conversion Websites offer the free service to convert cad files to lower version, see following.

Free online conversion services usually have limitations on the number and size of files.

How to Identify the Drawing Version Quickly?

If you don’t want to purchase and install the latest version, how can you identify the drawing version to select the CAD version?

Firstly, we select the drawing, right click, select Open With, and select Notepad to open it, after opening it, we can see a bunch of messy codes. Just remember the AC1021 in front of it.

Then, by comparing the version format comparison table below, you can know the version of the drawing saved.

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 2018/2019/2020/2021/2022/2023

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