CAL Converter

Convert CALS raster images (CAL) online for free


Drop or upload your .CAL file
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How to convert your CAL file

  1. Click the "Select File" button above, and choose your CAL file.
  2. You'll see a preview.
  3. Click the "Convert file to..." button to save your file in the format you want.

Convert CAL to another file type

The converter easily converts your CAL images to various formats - free and online. No XnView or or other Raster Image software needed.

  • CAL to J
  • CAL to PDF
  • CAL to PI2
  • CAL to PS3
  • CAL to TIM
  • CAL to TARGA
  • CAL to CH
  • CAL to CT
  • CAL to MIFF
  • CAL to 85I
  • CAL to PC2
  • CAL to ALIAS

Convert a file to CAL

To convert other file formats to the "CALS Raster Graphic" file type, you need software like XnView or a similar tool.


About CAL files

The .CAL file format primarily stores CALS Raster Images. The CALS (Continuous Acquisition and Life-cycle Support) standard was developed by the US Department of Defense to digitize technical documentation, engineering drawings, and military manuals. The format is strictly 1-bit, meaning it only stores black-and-white monochrome data. Less commonly, .CAL files may be legacy Microsoft Publisher calendar templates, SuperCalc spreadsheets, or Autodesk 3ds Max pose adjustments.

You can open CALS images with specialized graphics software like CorelDRAW, XnView, or ImageMagick. For a deeper technical overview, you can read about the CALS Raster file format on Wikipedia.

The main disadvantage of the .CAL format is its obsolescence. It is not natively supported by modern operating systems like Windows or macOS, and you cannot view it in web browsers like Google Chrome or Apple Safari. Sending a .CAL file to a client almost guarantees they will be unable to open it without installing third-party tools. Furthermore, its 1-bit limitation makes it entirely unsuitable for color graphics.

To make these files usable today, you must convert them. For web display, convert the file to PNG. For professional archiving or printing of technical drawings, convert it to TIFF or PDF. Drop your file here to view and convert it securely right in your browser using convert.guru - free, online, and without installing software.

Use Convert.Guru to open and convert your CAL file.

Users also converted CALS, WEBP, ULP, ZIP, ICAL, BIN, GEO, PDF, ODS, XSD, ICC, ICM and ICS files.


FAQ

If you want to convert CAL file to AL, OBJ, FBX, DAE, 3DS, MAX, BLEND, MA, MB or C4D, you can use XnView or similar software from the "Technical Document Imaging" category. In the File menu, look for Save As… or Export….

To convert DWG, DAE, X3D, IGES, WRL, JT, SKP, 3DS, 3DM, OBJ, STEP or FBX files to CAL, try XnView or another comparable tool in the "Technical Document Imaging" category.



The CAL Converter Story

The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our CAL converter.