How to open a DWG in Fusion 360

Step 1 — Upload the DWG into a Fusion project

Fusion works from cloud-hosted projects, so first upload the DWG. In the Data Panel, open or create a project, click Upload, and select the DWG (and any DXF you have). Fusion processes it in the background; once it finishes you can open it or insert it into a design.

Uploading rather than dragging in keeps the source file versioned in your project, which is handy if you re-import or share the model later. The blocks here are drawn in millimetres, so note that for the units check coming up.

Step 2 — Insert the DWG as a sketch

Open a new or existing design, then use Insert > Insert DXF or open the uploaded DWG directly. Fusion asks for a sketch plane to drop the 2D geometry onto — pick the XY ground plane for a plan block so it sits flat. The linework arrives as a sketch full of lines, arcs and circles, exactly like geometry you would draw by hand.

Because it is a real sketch, every curve is editable and dimensionable. That is the strength of bringing a DWG into Fusion: the imported block becomes a parametric starting point rather than a static picture.

Step 3 — Confirm the units and scale

Fusion designs carry a document unit, and the insert dialog usually lets you state the DWG's unit so it converts correctly. Make sure it treats the file as millimetres for a metric block. After insertion, sanity-check by dimensioning a known length — a 600 mm element should read 600 mm.

If the geometry came in scaled wrong, you can select the whole sketch and use the Sketch Scale tool with a factor (1000 or 0.001 are the usual culprits between metres and millimetres). Fixing units at the source insert is cleaner, but Sketch Scale is the rescue when something slips through.

Step 4 — Close the profiles for extrusion

Fusion can only extrude closed profiles, and DWG exports often have tiny gaps where lines almost-but-don't meet. With the sketch active, look for regions that fail to shade — those are open loops. Use the sketch tools to trim, extend or coincident-constrain the endpoints so each outline closes into a fillable region.

Once a loop is closed, Fusion shades it, signalling it is ready to extrude. For a furniture block you might close the seat outline, the arms and the base separately so each can become its own body at the right height.

Step 5 — Extrude or revolve into 3D

With closed profiles in hand, finish the sketch and use the Extrude command. Select a region, drag it to the height you want, and Fusion builds a solid body. Repeat for each part of the block, or extrude several regions at once if they share a height. For round parts like a turned leg, use Revolve around an axis instead.

From here the imported DWG has fully become a Fusion model: parametric, editable and ready for fillets, shells and assembly. The original 2D block lives on as the sketch that drove it, so you can revisit and adjust dimensions at any time.

Common issues opening DWG in Fusion 360

The biggest snag is scale. A block that arrives 1000 times off is a unit mismatch on insert; declare millimetres or use Sketch Scale to correct it. The second is failed extrusions, almost always caused by open loops with sub-millimetre gaps from the DWG export — zoom in on the endpoints and constrain them closed.

A third is over-detailed geometry: a busy DWG can flood a sketch with hundreds of fragmented curves that slow editing. Delete decorative detail you will not model, and trace only the outlines you need. Keeping the sketch lean keeps Fusion responsive as you build the solid.

It also helps to insert the DWG into its own sketch rather than mixing it with sketches you are already building. That isolation means you can hide, lock or delete the imported geometry as a unit once it has served its purpose, without disturbing the parametric work you have layered on top of it. Treat the imported sketch as a disposable reference and your timeline stays clean.