Convert DWG to DGN

Understanding DWG and DGN file formats

DWG is a proprietary binary file format used for storing two- and three-dimensional design data and metadata. It is the native format for several CAD packages including AutoCAD. DGN is a CAD file format developed by Bentley Systems and is primarily used in MicroStation and other Bentley products. Both formats are widely used in engineering, architecture, and construction industries, but are native to different software ecosystems.

Why convert DWG to DGN?

Converting DWG to DGN is often necessary when collaborating between teams using AutoCAD and MicroStation, or when project requirements specify the use of Bentley software. This ensures compatibility and preserves design integrity across platforms.

Best software for DWG to DGN conversion

The most reliable way to convert DWG to DGN is by using Autodesk AutoCAD or Bentley MicroStation. Both offer built-in tools for file conversion:

• Bentley MicroStation: Open your DWG file, then use File → Save As and select DGN as the target format. MicroStation supports both V7 and V8 DGN formats.
• Autodesk AutoCAD: Use the EXPORT command and choose DGN as the output format. You can specify the DGN version and other export options.

For batch conversions or automation, Bentley also offers Bentley iTwin Synchronizer and Bentley Batch Converter tools.

Online converters and alternatives

There are online services such as Zamzar and AnyConv that claim to convert DWG to DGN. However, for complex CAD files, it is recommended to use professional desktop software to avoid data loss or formatting issues.

Tips for successful conversion

• Check layer compatibility and mapping between DWG and DGN.
• Review the converted file in MicroStation to ensure all elements are preserved.
• Use the latest versions of software for best compatibility.