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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CALS Files
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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 28, 2025
"Our volunteer team uses reaConverter to prepare images for fundraising campaigns. The learning curve was minimal, and the results are professional-grade. The customer support team even helped us customize a workflow — fantastic service!"
Jason P. Bailey
Jason P. Bailey
Non-Profit Coordinator
"Tried a few image tools before, but this one is by far the easiest. Drag, drop, convert — done in seconds. It saved me a ton of time when organizing my image folders."
Lisa K.
Lisa K.
Happy User
"This converter delivers exceptionally quick format conversions with reliable results every time."
Brian White
Brian White
Happy User
"Working in a print studio means constantly juggling obscure file formats. I used to waste hours Googling converters or installing random software — until reaConverter became my Swiss Army knife. Install it once, and you're set forever. No internet? No problem!"
Helen Evans
Helen Evans
Satisfied Customer
"Rare software that actually does it all! Converts anything, beautiful interface, and never lets me down. A must-have!"
Henry R.
Henry R.
Happy User
"Creating marketing materials for various platforms requires multiple file versions from single sources. reaConverter's workflow automation lets us generate PNG, JPEG, and SVG variants from AI and PSD files simultaneously. The color profile management ensures brand consistency across all outputs, and the processing speed allows for last-minute changes without delaying deadlines."
Rebecca Turner
Rebecca Turner
Marketing Agency CEO

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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