Convert STS to CAL

By using our efficient and user-friendly STS to CAL converter, you can save yourself from the tiresome process of manually converting numerous .sts files into cal format for hours.

reaConverter is a fast offline STS to CAL converter. Whether you need to convert hundreds or thousands of STS files, reaConverter can handle it all.

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STS to CAL
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STSCAL

How to Convert Multiple STS Files 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. reaConverter is incredibly powerful and boasts an extensive variety of features.

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Install reaConverter

2. Load your STS files

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

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

Load your STS 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 STS 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.

STS to CAL Converter

reaConverter offers the fastest, simplest solution for converting your STS 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 STS 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 May 24, 2025
"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."
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Rebecca Turner
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"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!"
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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!"
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Kevin Harris
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"An efficient all-in-one solution for image conversion and light editing, designed for maximum user-friendliness."
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Elena Anderson
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"Enable shell integration for lightning-fast file conversions directly from Windows Explorer."
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"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."
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STS to CAL Conversion: FAQ

What are STS files?

An STS file contains a two-dimensional vector representation of the bottom solder mask which makes up a printed circuit board (PCB), and it is most likely created and processed with Eagle software. STS is part of a larger family of extensions called Gerber, which represent the de facto standard used in the PCB industry. Gerber files describe various aspects of electronic boards, including copper layers, solder masks, electrical connections, drilling or milling data. Similar formats include SOL, STC and PLC.

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 STS to CAL?

Yes! reaConverter instantly converts .sts 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 STS to CAL online?

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

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

The best way to change STSs 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 STS to CAL.

How can I automate STS 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 STS 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 sts to cal converter for batch processing.

What else can I do with reaConverter?

Convert PDFWatermark photosConvert GIS filesConvert Gerber imagesCrop photo

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