CAL Converter
Use our trusted tool with a wide range of features to convert CAL images in seconds. It provides an advanced solution for file conversion and processing.


How to Convert .cal Images in Bulk
1. Install reaConverter
2. Select CAL Files

3. Start Conversion

Convert CAL on your PC
For quick and effortless CAL file handling on your PC, reaConverter offers powerful conversion tools with batch processing. Best of all, it works entirely offline — ensuring your sensitive data never leaves your computer.
Do more with your images
Converting CAL images for use in a workflow? Touch up, transform, apply editing and effects to your images during conversion.
Our range of editing options includes such image processing actions as Resize, Rotate, Crop, Color Replace, Watermarks and more. Adjust actions include RGB, HLS, HSV, Brightness and Contrast. Auto-processing options are also available, such as auto-rotate and auto-crop.

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Last updated on February 26, 2025






CAL images: Frequently Asked Questions
What are CAL files?
The CAL Raster file format is a graphics file format used by the CALS (Continuous Acquisition and Life-cycle Support) standards for the United States Department of Defense. CAL Raster files are typically used to store and exchange monochrome or grayscale images, such as engineering drawings, maps, and schematics. The format is based on the MIL-DTL-25038 standard, which outlines the requirements for technical illustration in the defense industry. CAL Raster files are typically saved with a .cal or .rle file extension and are compressed in a run-length encoding (RLE) format to reduce the file size.
Can reaConverter open CAL files?
reaConverter fully supports the CAL image format – open, edit, and export CAL files to any other popular file format with ease.
How do I change CAL to another format?
reaConverter is a user-friendly tool for converting CAL files. Once installed on your computer, it allows you to convert all your .cal files at once with just a few clicks. You can even convert cal images directly from Windows Explorer using the right-click menu — fast and convenient.
Can I convert CAL online?
If you only want to convert a few CAL images, you are welcome to try our free online CAL converter.
How can I turn CAL files on my computer to another format?
The best way to convert CAL images on your PC is to get a quality piece of software, such as reaConverter. This software is extremely efficient in managing a wide range of batch files conversions, including conversion from CAL.
How can I automate CAL files conversion?
reaConverter supports all the essential automation features, such as right-click сonversion and Watch Folders, for the most efficient automated file conversion in any software of its kind.
Can I convert CAL files using scripts or the command-line interface?
reaConverter provides full access to all its features from the Windows command-line shell, including the command-line cal converter.
What else can I do with reaConverter?
Convert Gerber imagesCrop imagesConvert vector imagesConvert RGB to CMYKConvert RAW files
What formats can I convert a CAL file to?
What types of files can I convert to CAL format?
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