CALS Converter

Use our fast and easy CALS image converter. Using reaConverter you will be able to convert all your CALS files as once.

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CALSConverter

How to Convert .cals Images in Bulk

1. Install reaConverter

Download reliable CALS conversion software to convert multiple .cals files and folders in one go.
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Install reaConverter

2. Select CALS Files

Select CALSs from a folder or drag and drop them into reaConverter, then choose the desired output format.
reaConverter - Load CALS files

3. Start Conversion

Click Convert to start the bulk conversion of all selected CALS images. The process will begin right away.
reaConverter - Start CALS conversion

Convert CALS on your PC

For quick and effortless CALS 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.

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Do more with your images

Converting CALS 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.

Image editing tools
Image editing

User Reviews

Average User Rating:
Last updated on August 30, 2025
"For agencies handling confidential data, reaConverter eliminates cloud-upload risks while delivering unmatched conversion reliability. Our team uses it both in-office and remotely with identical results."
Jamal Bailey
Jamal Bailey
Satisfied Customer
"An efficient all-in-one solution for image conversion and light editing, designed for maximum user-friendliness."
Elena Anderson
Elena Anderson
Happy User
"I deal with hundreds of images daily, and reaConverter has been a lifesaver. The Watch Folders feature lets me automate file conversions without lifting a finger. I set up a folder for incoming files and it automatically resizes, renames, and converts them into the formats I need. It's like having a personal assistant!"
Sarah T.
Sarah T.
Graphic Designer
"Security was our top concern when evaluating file conversion tools. reaConverter’s offline mode and role-based access controls let us lock it down for sensitive environments. No unexpected network calls or bloat — just clean, fast conversions. Even passed our pen-testing scans without a hitch."
Marcus White
Marcus White
Healthcare IT
"Exactly what I needed! Simple, fast, and no bloat. I use reaConverter Lite to resize and convert batches of images for documents. The presets make it super easy, and everything works smoothly."
Mark Jones
Mark Jones
Happy User
"Your solution was buried deeper in search results than it should be. After struggling with unclear alternatives, I found your guides — finally, instructions that made sense for a first-time user like me. Excellent work!"
Richard E. Miller
Richard E. Miller
Satisfied Customer

CALS images: Frequently Asked Questions

What are CALS files?

CALS Raster file format is a standard file format used specifically for storing and exchanging black-and-white images that are created using computer-aided design (CAD) or document imaging systems. It was originally developed by the US Department of Defense as part of the Computer-Aided Acquisition and Logistics Support (CALS) initiative, which aimed to standardize the creation and sharing of technical data across different computer systems. CALS Raster files have a .cal or .mil file extension and typically contain uncompressed monochrome bitmap images. They are commonly used in industries such as defense, aerospace, and government, where precise technical drawings and diagrams need to be exchanged between different organizations and computer systems.

Can reaConverter open CALS files?

reaConverter fully supports the CALS image format – open, edit, and export CALS files to any other popular file format with ease.

How do I change CALS to another format?

reaConverter is a user-friendly tool for converting CALS files. Once installed on your computer, it allows you to convert all your .cals files at once with just a few clicks. You can even convert cals images directly from Windows Explorer using the right-click menu — fast and convenient.

Can I convert CALS online?

If you only want to convert a few CALS images, you are welcome to try our free online CALS converter.

How can I turn CALS files on my computer to another format?

The best way to convert CALS 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 CALS.

How can I automate CALS 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 CALS 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 cals converter.

What else can I do with reaConverter?

Set file dateCopy EXIF dataConvert CAD formatsSet picture bit depthConvert RAW formats

What formats can I convert a CALS file to?
ai  apng  avif  bmp  bpg  cal  cg4  cgm  cin  dcx  dds  dgn  dis  drw  dwf  dwg  dxf  emf  epi  eps  fax  fits  flif  gbr  gif  hpg  hru  ico  iff  iges  igs  jp2  jpeg  jpg  jxl  jxr  mif  mtv  pcl  pct  pcx  pdf  pgm  pic  plt  png  ppm  prc  ps  psd  qoi  qrt  rad  rla  sgi  shp  svg  svgz  tga  tif  tiff  webp  webpll  wmf  wmz  wpg  wrl  xbm  xpm 

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Explore our efficient CALS file converter that saves you time and effort by converting multiple .cals files into different formats.
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