Convert PRT to DWG
Convert vendor-specific PRT parts into checked 2D DWG drawings or 3D exchange geometry.
Make DWG files online
We can't read PRT files yet, so this conversion isn't available. If you can export your work to one of these formats - or others - we'll turn it into DWG:
How to convert prt to dwg file
- 3D modeling
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AutoCAD users and suppliers often require a DWG drawing instead of a native CAD part file for editing, fabrication, or exchange. The correct method depends on which application created the .prt file and whether the required result is a 2D drawing or 3D geometry.
What the PRT format is
.prt is an ambiguous extension used by several unrelated CAD systems. PTC Creo and Pro/ENGINEER use it for parametric part models; Siemens NX also uses .prt; older CADKEY versions use the extension for their own format. These files are not interchangeable, so the source application and its version must be identified before conversion.
A native PRT can contain a feature tree, sketches, constraints, surfaces, a solid model, parameters, materials, and manufacturing information. The source software may be identifiable from the project folder, file metadata, naming conventions, or the sender. Renaming the file does not change its format, and AutoCAD cannot generally open a native PRT directly.
What DWG contains
DWG is Autodesk’s native CAD database format, supported by AutoCAD and many compatible engineering applications. It can store 2D lines, arcs, dimensions, text, hatches, layers, blocks, and annotations; depending on the exporter, it can also contain 3D faces, meshes, or ACIS-based solids.
DWG is appropriate for editable AutoCAD drafting, fabrication documentation, supplier exchange, and archiving of 2D design information. It is not a replacement for the original parametric model: feature history, design intent, constraints, application-specific parameters, and some metadata normally disappear during export.
How to convert the file
Creo or Pro/ENGINEER PRT
- Open the file in the matching Creo or Pro/ENGINEER release, or in a compatible newer release, and regenerate the model.
- For a 2D result, create a drawing using File → New → Drawing and associate it with the PRT.
- Insert the required views, select the projection method and scale, and add dimensions, notes, centerlines, tolerances, and other required annotations.
- Export the drawing with File → Save As → Save a Copy, select
DWG, and choose a compatible DWG version and units when those options are available. - Open the exported file in AutoCAD or a DWG viewer and check dimensions, units, fonts, layers, lineweights, hatches, and missing references.
A Creo PRT is a 3D part, so the normal DWG workflow exports a drawing sheet rather than the parametric model itself. If the recipient needs 3D geometry, use the Creo release’s supported 3D DWG export if available, or export STEP and convert or import that model in the receiving CAD system. Available 3D export functions depend on the Creo release and license.
Siemens NX PRT
Open the part in Siemens NX, preferably the creating release or a compatible version. For a drawing, open or create the drafting sheet, then use the applicable File → Export → AutoCAD DXF/DWG command. Set the DWG version, units, layers, and view-export options, then inspect the result in AutoCAD. Exporting a part without a drafting sheet may produce 3D entities rather than a dimensioned 2D drawing.
When the source software is unavailable
Ask the file provider to export it from the native CAD application. Request DWG or DXF for a 2D drawing, or STEP—preferably AP214 or AP242—for a 3D exchange model. IGES is another option for surfaces and older workflows, but STEP is usually preferable for solid-model exchange. Neutral formats normally preserve less feature history than the original PRT.
CAD Exchanger Desktop and CAD Exchanger Cloud are possible options for supported PRT variants, but verify that the service lists the exact source system and version before relying on it. A cloud service may accept Creo PRT but reject Siemens NX or CADKEY PRT despite the identical extension. Do not upload confidential, export-controlled, or contract-restricted designs without authorization. Generic image and document converters cannot translate CAD PRT data.
Quality and compatibility checks
- Confirm the source system. A PRT extension alone does not identify a format, and a converter designed for one vendor’s PRT may not read another’s.
- Choose the required representation. A 2D export contains projected linework and annotations; a 3D export may contain faceted or non-parametric geometry rather than an editable native solid.
- Verify units. Check a known dimension after export. A millimetre-to-inch error can scale geometry by 25.4 or 0.03937.
- Inspect unsupported entities. Cosmetic threads, datum features, associative dimensions, custom symbols, hatch patterns, fonts, and layer mappings commonly need correction.
- Select a compatible DWG version. Export to the oldest version that supports the required entities and that the recipient’s AutoCAD or viewer can open.
- Validate the file. Compare multiple measured dimensions, inspect every view, and run the receiving CAD program’s audit or repair function. Keep the original PRT as the authoritative design file.
