Convert PEN to CAL

If you're looking for a reliable and efficient software tool to convert your PEN files to CAL format with ease, you can count on reaConverter.

reaConverter offers offline file conversion between numerous formats, including PEN to CAL, plus additional image editing tools for enhanced file preparation.

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PEN to CAL
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PENCAL

How to Convert Multiple PEN Images to CAL?

1. Download and Install reaConverter

reaConverter is quick to download, install and launch. This standalone software is extremely efficient in managing a wide range of batch conversions. At the same time, it will allow you to apply image editing options during conversion.

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Install reaConverter

2. Load your PEN files

Start reaConverter and load all the .pen files you intend to convert into .cal. The software supports multiple PEN conversion and processes all files locally on your computer.

Select PENs from a folder or by drag-and-dropping them directly into the reaConverter window.

Load your PEN files into reaConverter

3. Select CAL as output format

Pick the CAL as output format and choose the destination folder where you want to save new .cal files.

Select CAL as output format

4. Start PEN to CAL conversion

Then simply press Convert button and your conversion will begin in no time!

Screenshot

Once the conversion is complete, you can find your CAL files in the destination folder you selected.

PEN to CAL offline

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

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Do more with your images

Converting PEN 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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Image editing

User Reviews

Average User Rating:
Last updated on April 23, 2025
"Finally an app that actually opens my weird files! Saves me from format frustration daily."
Kyle Brooks
Happy User
"This converter delivers exceptionally quick format conversions with reliable results every time."
Brian White
Happy User
"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
Healthcare IT
"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
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
Satisfied Customer
"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
Non-Profit Coordinator

PEN to CAL Conversion: FAQ

What are PEN files?

The PEN raw photo format, specific to Pentax cameras, refers to the proprietary RAW file format used to store unprocessed image data directly from the camera's sensor. This format allows photographers to capture and retain the highest level of detail, dynamic range, and tonal information, providing extensive flexibility in post-processing.

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 PEN to CAL?

Yes! reaConverter instantly converts .pen 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 PEN to CAL online?

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

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

The best way to change PENs 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 PEN to CAL.

How can I automate PEN 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 PEN 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 pen to cal converter for batch processing.

What else can I do with reaConverter?

Convert vector filesConvert picture color spaceChange file dateChange format settingsChange image DPI

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