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Top 10 Sheet Metal Unfolding Programs (2025)

If you work in metal fabrication, HVAC, or industrial design, you know how important it is to generate accurate sheet metal developments. Whether you're working with transitions, elbows, cones, or custom enclosures, the right software can save you hours of manual calculation and drawing time.

In this article, we’ve put together a list of 10 popular sheet metal unfolding programs — from professional CAD suites to specialized unfolding platforms — to help you explore the best tools available for your workflow.

Note: This list is not a ranking. The order of appearance does not reflect preference, performance, or feature level — it’s simply a collection of noteworthy tools used across the industry.

1. AUTOpol

Professional-grade software for 3D modeling and sheet metal unfolding, often used in press brake simulation workflows. Windows only.

2. SolidWorks Sheet Metal

Part of the SolidWorks suite, this tool allows parametric design and unfolding of complex sheet metal parts. Ideal for engineers using SolidWorks.

3. CaldereriaOnline.com

Web-based platform offering easy-to-use tools for unfolding cylinders, cones, transitions, segmented elbows, and other patterns — no installation required.

CaldereriaOnline.com is an online platform designed to assist professionals in the sheet metal fabrication industry by providing tools to create accurate unfolded patterns for various components such as ducts, cones, elbows, and transitions. This service is particularly beneficial for industries like HVAC, vessel manufacturing, and custom metalwork.

Key features:

• Web-Based Access: The platform operates entirely in the browser, eliminating the need for installations or specific hardware requirements. Users can access the service from any internet-connected device, including computers, tablets, and smartphones.
• Affordable Licensing: The platform offers various subscription packages to cater to different usage needs, making it a cost-effective solution for small workshops and large enterprises alike.
• Extensive Pattern Library: CaldereriaOnline.com provides a wide range of pattern types, including cylinders, cones, transitions, Ys, elbows, branches, helixes, spheres, and profiles.

4. Logopress3

A SolidWorks plugin specializing in die and tool design, offering advanced unfolding features for progressive dies and stamping applications.

5. Sheet Lightning Pro

Focused on cylindrical, conical, and transitional shapes, this software is popular in HVAC, ductwork, and pressure vessel design.

6. Inventor Sheet Metal

Autodesk Inventor includes sheet metal capabilities for part design and unfolding. Useful for manufacturing and mechanical design workflows.

7. FastCAM

Includes unfolding features along with CNC cutting and nesting tools. Frequently used in plasma, laser, and oxy-fuel cutting environments.

8. SPI SheetMetalWorks

Advanced add-in for SolidWorks focused on improving sheet metal unfold precision for manufacturing, especially in the HVAC and cabinet industries.

9. LITIO2 Sheet Metal

LITIO 2.0 is a sheet metal design add-on for AutoCAD, GStarCAD, ZWCAD, BricsCAD, and CADMATE, developed by LITIO.si. It specializes in calculating and generating flat (unfolded) sheet developments for various sheet metal components, including ducts, transitions, cones, pipe intersections, elbows, and more. The software is particularly useful in industries such as HVAC, tanks, vessels, hoppers, cyclones, dust extraction, and conveying systems.

As of March 1, 2025, LITIO 2.0 has been discontinued for new downloads and purchases. Users are encouraged to transition to CaldereriaOnline.com, a new platform offering similar functionalities with the advantage of being CAD-independent and accessible from various devices.

10. Metalix AutoNest / MBend

Suite of software tools for automating sheet metal fabrication processes — including nesting, bending, and unfolding — with strong CNC integration.

Comparison table of the top 10 sheet metal unfolding programs

Final notes:

• 💻 Web-based: Only CaldereriaOnline.com works entirely in the browser with no installation.
• 💰 Freemium: CaldereriaOnline offers TRIAL for free; very conveniente packages.
• 💡 HVAC/Vessel Focus: Sheet Lightning and CaldereriaOnline are strong in cylindrical and conical shapes, transitions, Tees, Ys, etc.
• 🧩 SolidWorks plugins: Logopress3 and SPI require SolidWorks as a base.

🎥 What is CaldereriaOnline.com for

Check the following video on how CaldereriaOnline.com help in your sheet metal fabrication workshop, and what it is not intended for.

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For more expert insights and tools to optimize your sheet metal workflow, stay tuned to our blog and explore our suite of online development tools designed to streamline your sheet metal design process.