Convert SKP to CAD

AutoCAD, CAM software, and consultants commonly require .dwg or .dxf when the source arrives as a SketchUp .skp model. Confirm the recipient’s required format, DWG version, units, and whether they need a 2D drawing or editable 3D geometry before exporting.

SKP and CAD file formats

SKP is SketchUp’s native model format, used by SketchUp desktop and web applications. It stores geometry, groups, components, tags, scenes, materials, section planes, and other SketchUp-specific model data; it is common in architectural concepts, interiors, furniture, site studies, and product models.

“CAD” is a software category, not a single file format. The usual requested CAD exchange formats are:

• DWG: Autodesk’s native drawing format, widely used by AutoCAD, BricsCAD, DraftSight, and compatible applications for editable 2D drawings and 3D geometry.
• DXF: Autodesk’s exchange format, supported by many CAD, CAM, CNC, laser-cutting, and plotting applications. It is often requested for 2D profiles and linework.

DWG and DXF provide editable geometry, layers, and dimensions suitable for CAD workflows. A file named .cad is not a universal CAD format; identify the receiving application and its required file type instead of treating it as interchangeable with DWG or DXF.

Export with SketchUp Pro

SketchUp Pro desktop is the preferred conversion method because it exports SketchUp geometry directly to DWG and DXF. SketchUp Free for Web does not provide the same DWG/DXF export capability.

1. Open the .skp file in SketchUp Pro and save a separate copy before modifying it.
2. Set the intended units in Window → Model Info → Units. Obtain the recipient’s required units: millimeters, meters, inches, or feet.
3. Clean the model. Delete unwanted entourage and guide geometry, hide or remove irrelevant tags, and run Window → Model Info → Statistics → Purge Unused to remove unused components, materials, and styles.
4. For a 3D model, select File → Export → 3D Model, choose DWG or DXF, open Options, select the required AutoCAD version and export units, then export.
5. For a plan, elevation, section, or fabrication outline, set the exact view first. Use Parallel Projection for scaled orthographic views, activate the required section plane if needed, then select File → Export → 2D Graphic and choose DWG or DXF.
6. Open the result in AutoCAD or the recipient’s actual software. Measure a known object, inspect layers and linework, and check the drawing origin before delivery.

Use 2D export for drawings and machine profiles; use 3D export only when the recipient needs the model geometry. For a plotted drawing with dimensions, title blocks, and controlled line weights, create the sheet in LayOut or complete the documentation in the receiving CAD application rather than expecting a raw 3D export to produce a finished drawing.

Other conversion options

Recent AutoCAD versions can import supported SketchUp files through the IMPORT command. Import the model, inspect the resulting entities, then use File → Save As to save the required DWG release. This is useful when the final cleanup will occur in AutoCAD, but it does not convert SketchUp geometry into clean native solids automatically.

CloudConvert and Zamzar offer browser-based SKP conversion when SketchUp Pro or AutoCAD is unavailable. Upload only non-confidential models, check supported SKP versions and output limits before conversion, and validate the downloaded DWG or DXF in CAD software. Online conversion can flatten structure, alter layers, or fail on large and complex models.

Geometry and compatibility limits

SketchUp models are generally face-and-edge models. Exported 3D objects commonly arrive as meshes, surfaces, or separate CAD entities rather than intelligent AutoCAD solids. Groups and components may become blocks or nested entities, depending on export settings and the program that opens the file.

Curves in SketchUp consist of straight segments, so circles, arcs, and curved surfaces may appear faceted after export. Increasing segment counts improves the visible curve but increases file size and entity count.

Materials, textures, shadows, styles, scenes, animations, geolocation, and other SketchUp display data do not reliably transfer into DWG or DXF. SketchUp tags can map to CAD layers, but layer names, visibility, nesting, and block behavior should be checked after import.

For CNC, laser, waterjet, or plasma work, provide only clean planar closed profiles. Remove duplicate edges, overlapping lines, internal construction edges, gaps, and non-planar geometry; a general 3D SketchUp model is not a valid machine cut path without this cleanup.

Ask which DWG release the recipient can open, such as AutoCAD 2018 DWG. Exporting to an older release can improve compatibility with older software, while a mismatched unit setting can scale a 1000 mm object as 1000 inches or generic drawing units.