Convert RP to CAL

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

Looking to change RP files to CAL format? reaConverter makes it simple — add your files, select output format, and convert entire folders in one click. Runs entirely on your hardware for maximum speed — no waiting for uploads or server queues.

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How to Convert Multiple RP Files to CAL?

1. Download and Install reaConverter

reaConverter is a standalone Windows app — download, install, and start converting RP files in under two minutes.

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Install reaConverter

2. Load your RP files

Start reaConverter and add your .rp files. The software processes everything locally, so your files never leave your computer.

Use drag-and-drop, folder browser, or right-click conversion from Explorer.

Load your RP files into reaConverter

3. Select CAL as output format

Select CAL from 700+ supported output formats. Choose your destination folder and adjust settings to match your needs.

Select CAL as output format

4. Start RP to CAL conversion

Click Convert to start the batch. reaConverter processes files quickly and shows you the status of each one.

Start Conversion

Once done, reaConverter shows a summary. Click 'Show converted files' to jump straight to your CAL output.

RP to CAL Converter

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

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Do more with your files

Converting RP files for use in a workflow? reaConverter offers many ways to process files, so you can customize them according to your requirements.

Our range of editing options includes auto-processing options such as auto-rotate, auto-crop, watermarking and more. Change Color Space, copy Metadata, set DPI, manage ICC Profile, control Bit Depth.

Conversion features
Image editing

User Reviews

Average User Rating:
Last updated on January 25, 2026
"An efficient all-in-one solution for image conversion and light editing, designed for maximum user-friendliness."
Elena Anderson
Elena Anderson
Happy User
"Enable shell integration for lightning-fast file conversions directly from Windows Explorer."
R. Lewis
R. Lewis
Happy User
"After 200+ conversions on my budget laptop (i3-1115G4/4GB RAM/Win11), reaConverter outperforms heavyweight tools. Zero crashes, low CPU usage during batch processing, and no internet dependency - exactly what professionals need."
Walter Morgan
Walter Morgan
Satisfied Customer
"An ultra-fast solution for minimizing file sizes. The entire conversion process takes just 3 minutes!"
Logan B.
Logan B.
Satisfied Customer
"I use the online converter — it’s quick and hassle-free!"
Jian Wong
Jian Wong
Happy Online 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

RP to CAL Conversion: FAQ

What are RP files?

RP is an image format associated with Rainbow Painter, an image processor first released in the early 1990s. The program included a variety of features for image editing and capturing screenshots, and had several upgraded releases in the following years, designed for both Mac OS and Windows platforms. Rainbow Painter has now been discontinued for a few years, so the RP format is considered obsolete and uncommon.

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 RP to CAL?

Yes! reaConverter instantly converts .rp 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.

Can I convert RP to CAL online?

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

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

The best way to change RPs 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 RP to CAL.

How can I automate RP 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 RP 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 rp to cal converter for batch processing.

What else can I do with reaConverter?

Convert GIS filesConvert DICOM filesResize picturesConvert PDF filesAdd watermark on photo

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