Convert CAL to HRU

CAL to HRU made simple. Add files or folders, pick your settings, click Convert. reaConverter handles the rest — even thousands of files.

Batch CAL to HRU conversion doesn't have to be complicated. reaConverter processes entire folders with consistent quality settings. Works offline with no internet required — convert anywhere, anytime.

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CAL to HRU
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CALHRU

How to Convert Multiple CAL Images to HRU?

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. Built-in editing tools let you resize, crop, or watermark as you convert.

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Install reaConverter

2. Load your CAL files

Load your CAL files into reaConverter. You can add individual files or point to folders, and the software will queue everything automatically.

Select CALs from a folder or drag-and-drop them directly into the reaConverter window.

Load your CAL files into reaConverter

3. Select HRU as output format

Choose HRU for output and set your save location. reaConverter lets you customize quality and apply edits before conversion.

Select HRU as output format

4. Start CAL to HRU conversion

Press the Convert button and reaConverter takes care of the rest. Processing time depends on file size and volume.

Start Conversion

After processing, find all your new .hru files in the output location. The log shows details for each conversion.

CAL to HRU Converter

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

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Do more with your images

Converting CAL 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 25, 2026
"The step-by-step video makes conversion foolproof. I'd recommend this to my grandma - it's that well-explained!"
DeShawn M. Thompson
DeShawn M. Thompson
Happy User
"I'm really impressed with this software - it converts files between formats incredibly fast!"
Lin Zhang
Lin Zhang
Happy User
"I firmly believe working with JPEG — the universal format supported by all devices and apps—is the wisest choice. reaConverter handles these conversions flawlessly."
Ava Thomas
Ava Thomas
Happy User
"Your solution was buried deeper in search results than it should be. After struggling with unclear alternatives, I found your guides — finally, instructions that made sense for a first-time user like me. Excellent work!"
Richard E. Miller
Richard E. Miller
Satisfied Customer
"Converts files in seconds! Finally a tool that's both fast and simple to use."
Wei Chen
Wei Chen
Happy User
"I'd been searching for reliable conversion software forever — reaConverter has everything I need! After installing and watching the tutorial, I had my files converted to the perfect format in minutes. Flawless experience!"
Sanjay Mehta
Sanjay Mehta
Satisfied Customer

CAL to HRU Conversion: FAQ

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.

What are HRU files?

The HRU file format is a bitmap image format associated with the Soil and Water Assessment Tool (SWAT), which is a model developed through the SWAT-CUP program in Microsoft Windows. This software generates a detailed simulation model aimed to assess the result of various land management techniques in the case of large-size watersheds. HRUs represent output files containing detailed information compiled through SWAT, generally under the form of extensive tables with a large number of variables.

Can reaConverter convert CAL to HRU?

Yes! reaConverter instantly converts .cal to .hru 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 CAL to HRU online?

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

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

The best way to change CALs to HRUs 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 CAL to HRU.

How can I automate CAL to HRU 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 CAL files to HRU using the command prompt?

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

What else can I do with reaConverter?

Convert CAD formatsSet picture bit depthConvert Gerber imagesCrop fileConvert GIS files

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