Convert DWG to CAL

Understanding DWG and CAL 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. CAL (CALS Raster) is a bitmap image format developed by the U.S. Department of Defense, commonly used for document imaging and technical drawings, especially in engineering and government sectors.

Why convert DWG to CAL?

Converting DWG to CAL is often necessary when you need to share CAD drawings in a standardized raster format for archiving, printing, or integration into document management systems that require CALS Raster images.

How to convert DWG to CAL

Direct conversion from DWG to CAL is not commonly supported in most CAD software. The typical workflow involves two steps:

1. Export the DWG file to a common raster format such as TIFF or BMP.
2. Convert the raster file to CAL format using specialized raster conversion software.

Recommended software for DWG to CAL conversion

• AutoCAD: Use File → Export → Other Formats to export your DWG as a TIFF or BMP file.
• XnConvert: A free batch image converter that supports converting TIFF or BMP to CAL format.
• Okino PolyTrans: A professional tool that can handle complex CAD conversions, including DWG to raster formats and then to CAL.
• VeryPDF Raster to Vector Converter: Supports conversion from raster images to CALS Raster format.

Step-by-step conversion process

1. Open your DWG file in AutoCAD or a compatible CAD viewer.
2. Export the drawing as a TIFF or BMP image using File → Export → Other Formats.
3. Open the exported image in XnConvert or VeryPDF Raster to Vector Converter.
4. Select CAL (CALS Raster) as the output format and start the conversion.

Tips for successful conversion

• Ensure your exported raster image has sufficient resolution to preserve drawing details.
• Check CAL format settings, such as compression and bit depth, to meet your requirements.
• Test the CAL file in your target document management or imaging system to verify compatibility.