How to convert 3DM to STP
- Add your .3DM file - drop it in the box above or click to browse.
- Convert it to .STP in a few seconds.
- Download your new .STP file.
What to expect
.stpand.stepare the same format (ISO 10303) - the extensions are fully interchangeable and accepted by all major CAD tools.- NURBS solids and surfaces transfer with full geometric precision; Rhino-specific data such as layers, materials, and annotations are not part of STEP.
- If the receiving program reports import errors, re-export from Rhino using the AP203 protocol instead of the default AP214.
Frequently asked questions
Can I convert 3DM to STP without Rhinoceros?
Yes - Autodesk Fusion imports
.3dm and exports STEP for free (personal use), and the on-page converter requires no software at all.Are .stp and .step the same file format?
Yes, both extensions refer to STEP (ISO 10303) and are fully interchangeable - the choice of extension does not affect how the file opens.
Will the STP file open in SolidWorks or Inventor?
Yes, STEP is the universal exchange format for mechanical CAD and is supported by all major applications.
Is any geometry lost during conversion?
NURBS geometry converts exactly; what you lose is Rhino-specific metadata such as layers, materials, and render meshes, not the shape itself.
Programs that convert 3DM: 3D Object Converter · TurboCAD · Autoconverter · CrossManager · TurboCAD for Mac · Autodesk Fusion 360
