Convert HPG to CAL

Need to convert hundreds of HPG files to CAL? reaConverter does it in one click. No file limits, no watermarks, no internet required.

Online converters too slow for your HPG 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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HPG to CAL
Online
HPGCAL

How to Convert Multiple HPG Files 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.

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Install reaConverter

2. Load your HPG files

Add HPG files to reaConverter. One file or a thousand, the process is the same. Everything runs locally on your machine.

You can drag-and-drop files, browse to a folder, or add entire directory trees including subfolders.

Load your HPG files into reaConverter

3. Select CAL as output format

Select CAL from the output format list and set your destination folder. You can also adjust quality and compression settings.

Select CAL as output format

4. Start HPG to CAL conversion

Click the Convert button to start. reaConverter will process all your files with the settings you selected.

Start Conversion

When finished, your new .cal files will be waiting in the destination folder.

HPG to CAL Converter

reaConverter offers the fastest, simplest solution for converting your HPG 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 HPG 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 20, 2026
"reaConverter handles HPG files flawlessly. I use it to convert plot files to PDF for approvals, and the output is always accurate. The automation through Watch Folders and command-line is a big plus for speeding up our workflow."
Daniel M.
Daniel M.
Mechanical Engineer
"Finally, an HPG Converter That Just Works! Last week, we processed 237 HPG blueprints in 18 minutes. Previously, this took half a workday!"
Kevin Nguyen
Kevin Nguyen
Satisfied Customer
"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
"I was drowning in mismatched file formats until I found reaConverter. The one-click conversion and editing tools simplified everything, and the pricing is reasonable for small businesses. Now I spend less time troubleshooting and more time growing my brand!"
Emily K.
Emily K.
E-commerce Entrepreneur
"This program is incredibly simple and user-friendly, even beginners can use it with ease. It supports batch processing, works offline, and runs smoothly on my aging Acer Aspire laptop. Best of all, the output quality is outstanding!"
Kevin Harris
Kevin Harris
Happy User
"Finally an app that actually opens my weird files! Saves me from format frustration daily."
Kyle Brooks
Kyle Brooks
Happy User

HPG to CAL Conversion: FAQ

What are HPG files?

HPG is a vector image format created in a standard programming language called HPGL (Hewlett-Packard graphics language). Other extensions created in this language include PLT, HP2 and PL2. All are called "plotter files" and are created by drawing programs such as AutoCAD to be printed using a device specialized in vector graphics. An HPG file uses a line series of two-letter codes to render an image and can also include parameters.

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 HPG to CAL?

Yes! reaConverter instantly converts .hpg 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 HPG to CAL online?

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

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

The best way to change HPGs 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 HPG to CAL.

How can I automate HPG 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 HPG 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 hpg to cal converter for batch processing.

What else can I do with reaConverter?

Convert PDFWatermark photosConvert vector imagesConvert picture color spaceConvert GIS files

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