You can simply save *.dwg file to *.dwt using AutoCAD's save as function. This is used to create a template from an existing drawing to make creation of new drawings based on the original easier and faster.
Convert AutoCAD drawing to AutoCAD template.
We have found 2 software records in our database eligible for .dwg to .dwt file format conversion.
Microsoft Windows software - convert dwg to dwt on Windows
Leading 2D and 3D CAD development software from Autodesk
Convert from dwg file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned dwg to dwt. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
An application for the planning of spaces and furnishings