AC1027: the AutoCAD 2013 DWG format
AC1027 is the version code of the AutoCAD 2013 DWG format. A drawing that starts with AC1027 was saved by AutoCAD 2013 to 2017, or by another CAD program set to that format. Five releases used it, so it is one of the most common versions in drawing archives.
Open an AC1027 file free Check a file's version
AC1027 at a glance
| Version code | AC1027 |
|---|---|
| Format name | AutoCAD 2013 drawing |
| Saved by | AutoCAD 2013 to 2017 |
| Opens in | AutoCAD 2013 and later |
| Opens in DWG Plotter | Yes, free in your browser |
Which software opens an AC1027 file
Every AutoCAD and AutoCAD LT release from 2013 onwards opens it, as do most other CAD programs that read DWG. AutoCAD 2012 and older cannot open it and show an error instead.
Without AutoCAD, drop the file into the free DWG viewer: you can see every layout, zoom, measure and save it as a PDF. The file is read on your computer and never uploaded.
Opening it in an older AutoCAD
Ask whoever sent the file to save a copy in an older format: Save As, then pick the “AutoCAD 20xx Drawing” file type that matches your release, such as “AutoCAD 2010/LT2010 Drawing (*.dwg)”. If you only need to look at or print the drawing, converting it to PDF is quicker.
Saving a drawing as AC1027
In AutoCAD 2013 or later, choose Save As and set the file type to “AutoCAD 2013/LT2013 Drawing (*.dwg)”. To make it the default, change it under Options, Open and Save. Saving in an older format can simplify objects that format does not support, so keep the original too.
Questions
Which AutoCAD version is AC1027?
It is the AutoCAD 2013 DWG format, used by AutoCAD 2013 to 2017.
Can AutoCAD 2012 open an AC1027 file?
No. AutoCAD 2012 reads only up to AC1024. Save the drawing as “AutoCAD 2010/LT2010 Drawing (*.dwg)”, or view it in a browser instead.
How do I check whether my file is AC1027?
Drop it into the DWG version checker, or open it in a plain text editor: the first six characters are the version code.
Do DXF files use the same AC1027 code?
Yes. A DXF file stores the same code after $ACADVER near the top, so a DXF marked AC1027 is in the 2013 format.
Other DWG versions
AC1032 (2018) · AC1024 (2010) · AC1021 (2007) · AC1018 (2004) · AC1015 (2000) · All versions in one table