Convert BMP to CAL

Stop converting BMP files one by one. reaConverter processes entire folders to CAL automatically — just drag, drop, and click Convert.

Online converters too slow for your BMP files? reaConverter works locally and handles unlimited batches. All processing runs locally on your PC, so your files stay private and secure.

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How to Convert Multiple BMP Images to CAL?

1. Download and Install reaConverter

First, grab reaConverter from the download button below. Installation is fast, and the software runs offline — no account or signup needed. reaConverter also includes editing tools: resize, crop, rotate, and more.

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Install reaConverter

2. Load your BMP files

Open reaConverter and add your BMP files. You can load individual files, entire folders, or even nested subfolders.

Drop your BMP files into the window or use File menu to browse and select folders.

Load your BMP files into reaConverter

3. Select CAL as output format

Choose CAL as the target format. Pick a destination folder or let reaConverter save files alongside the originals.

Select CAL as output format

4. Start BMP to CAL conversion

Hit Convert and let reaConverter do the work. The progress window shows status for each file in real time.

Start Conversion

After conversion, find your CAL files in the output folder. Click 'Show converted files' to open it directly.

BMP to CAL Converter

reaConverter offers the fastest, simplest solution for converting your BMP files into CAL in seconds - all images processed on your PC for maximum privacy and speed.

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Do more with your images

Converting BMP images for use in a larger project? With reaConverter, you can convert, edit, and enhance your images in one streamlined process.

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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User Reviews

Average User Rating:
Last updated on January 15, 2026
"Perfect for quick conversions! When I just need to turn a few BMPs into JPGs, this online tool saves me from installing software. Three clicks and done - couldn't be simpler!"
Rev. David M. Johnson
Rev. David M. Johnson
Happy Online User
"Hands down the fastest JPG converter online! Upload → Select format → Download. Free, simple, and gets the job done in seconds."
Lin Zhang
Lin Zhang
Happy Online User
"The best online service for quick file conversion to JPG format - at least the best I've found! Just upload your file, select the format, click a button, and you're done. An excellent free tool that just works!"
Olivia Wilson
Olivia Wilson
Happy Online User
"This online converter works perfectly for small batches of files. I occasionally need to convert BMP to JPG, and it doesn't make sense to install software for such simple tasks. It's much easier to just visit the site, click a couple buttons, and get the same quality result in seconds."
Christopher Brown
Christopher Brown
Satisfied Customer
"An excellent program! I use it regularly in my work - it supports nearly every file format imaginable. The interface is intuitive and runs flawlessly every time."
Roger Cook
Roger Cook
Happy User
"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

BMP to CAL Conversion: FAQ

What are BMP files?

The BMP or Bitmap file format is a popular raster graphic format, compatible with a wide array of image processing software, both on PC and Mac computers. BMP files store grids of pixels and detailed information concerning color tones and shades, and are highly appreciated for their ability to provide increased quality images. However, due to the lack of any compression algorithm in storing pixel data, BMP images can often be very large in size and thus difficult to store or transfer.

What are CAL files?

A CAL image file represents a monochrome bitmap image that uses the CALS raster image standard for storing graphics data. This standard was created in the 1980s by the US Department of Defence as a compressed interchangeable image format. CAL and CALS are extensions used for similar purposes.

Can reaConverter convert BMP to CAL?

Yes! reaConverter instantly converts .bmp to .cal with perfect quality preservation. With its batch processing feature, you can convert multiple files at once in just a few clicks. You can even convert images directly from Windows Explorer using the right-click menu — fast and convenient.

What is reaConverter used for?

reaConverter is a software program used for converting images and other types of files from one format to another. It supports a wide range of file formats and allows users to convert multiple files at once, making it a valuable tool for graphic designers, photographers, and other professionals who work with digital images. reaConverter also includes features for resizing, cropping, and editing images, along with batch processing capabilities that help automate repetitive tasks.

Can I convert BMP to CAL online?

If you only need to convert a few BMP files to CAL format, feel free to try our free online free online BMP to CAL converter — perfect for small batches with no installation needed!

How can I turn BMP files into CAL on my computer?

The best way to change BMPs to CALs on your PC is to install 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 BMP to CAL.

How can I automate BMP to CAL files conversion?

reaConverter supports all the most useful automation features such as right-click сonversion and Watch Folders for the most efficient automated files conversion in any software of this type.

Is there a way to convert BMP files to CAL using the command prompt?

reaConverter provides full access to all its features via Windows command line, including a high-performance command-line bmp to cal converter for batch processing.

What else can I do with reaConverter?

Set file dateConvert RAW formatsConvert DICOM imagesPicture resizerConvert CAD formats

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