Converting a 3D model into an IFC format

How to convert a 3D file made with sketchup (or another BIM software) into an IFC file? In this article I’ll explain how to use a free IFC viewer!

A BIM methodology typically integrates all the useful information into a single model during the design stage, combining architectural, structural, plant and technical installation system aspects.

The BIM methodology is, in fact, based on the collaboration between different figures involved in different phases of an asset’s life cycle.

The information exchange takes place thanks to the IFC: a special open data and non-proprietary format that enables collaboration between the various figures involved in the construction process. Therefore facilitating the information exchange, without any risk of data loss.

The IFC file then becomes, a means of communication between professionals using different software.

In addition, you can read the following in-depth articles:

IFC 5: what it is and how to manage the new standard with the IFC5 viewer

How to easily convert a DWG file into IFC

3D to IFC: the advantages of conversion

The conversion of a 3D model into IFC format represents an essential step to improve interoperability and efficiency in BIM projects. This process allows for the transformation of models created with different software (such as AutoCAD, SketchUp, Rhino, etc.) into a standardized and open format, ensuring compatibility between design, analysis, and construction management platforms.

One of the main advantages of conversion is the preservation of geometric and parametric information, avoiding the loss of fundamental data during the exchange between software. IFC is not limited to the three-dimensional representation of the building but also integrates detailed metadata such as material properties, technical specifications, energy data, regulatory classifications, and information on structural and plant components.

Another key benefit is the ability to perform advanced analyses directly on the IFC model, such as energy simulations, structural assessments, and compliance checks, without having to recreate or translate the data into other formats. This accelerates workflows and reduces the risk of errors due to incompatibilities between proprietary software. Additionally, tools like usBIM.viewer+ allow for the visualization, modification, and integration of 3D models converted to IFC, facilitating project reviews by architects, engineers, contractors, and facility managers.

From a long-term management perspective, IFC ensures secure and accessible storage of digital models, eliminating obsolescence issues related to the use of specific software. This aspect is crucial for building maintenance and facility management, allowing companies to consult and update project information even years later, without facing costly subsequent conversions.

The role of IFC in BIM methodology

Thanks to its standardized and neutral nature concerning proprietary software, IFC eliminates compatibility barriers between the various platforms used by architects, engineers, and builders, enabling effective collaboration throughout the entire lifecycle of the building. Each element of an IFC model retains not only the geometry but also material properties, technical information, and relationships with other components, ensuring a faithful and functional digital representation.

The adoption of IFC within the BIM methodology is crucial for the digitalization of the AEC (Architecture, Engineering & Construction) sector, offering concrete advantages such as reducing conversion errors between software, enabling advanced performance analyses (e.g., energy simulations or structural checks), and supporting the operational and maintenance management of the building. Furthermore, thanks to Model View Definitions (MVD), it is possible to customize the exported data according to the specific needs of each project phase, improving the quality of shared information.

A key aspect is its regulatory recognition: IFC is regulated by ISO 16739:2013 and is promoted by buildingSMART International, with increasing adoption in public and infrastructure projects. In this context, IFC is not just a file format but a strategic pillar for a more efficient, sustainable, and interconnected construction sector.

How to convert a 3D model into IFC using a software

Using a free IFC viewer you have numerous features, including the ability to convert and export to IFC format, files such as: AutoCAD® (.dwg) 3D model, SketchUp (.skp), 3D Studio Max® (.3ds) and many others.
In this short example we will see how simple and immediate it is to convert a SketchUp object (.skp) into an IFC format using usBIM.viewer+.

• From the usBIM.viewer + menu create a new document and upload a 3D model.

• Name the entity, indicate the model’s unit of measurement and then assign it to the relevant IFC class.

• Start the conversion and insert the object into the model

We have seen how easy it is to convert a sketchUp file into IFC format with a few simple steps.

Moreover, thanks to usBIM.viewer+ you can export in 2x3IFC file format. Having therefore the possibility to add properties to the IFC files. Thus enriching existing information with further technical, commercial, structural, technical system installation, estimating and many other data. Particularly without the need of a BIM authoring software.

Below we suggest a video showing how to convert a 3D model into IFC format:

FAQ on converting 3D models to IFC

How do you convert a 3D file created with SketchUp into an IFC file?

You can convert a SketchUp file (.skp) into IFC format using a free IFC viewer like usBIM.viewer+. Just upload the 3D model, assign a name to the entity, set the unit of measurement, and start the conversion.

What are the advantages of converting a 3D model to IFC?

It ensures interoperability between different software, preserves geometric and parametric data, allows for advanced analyses (structural, energy, etc.), and ensures long-term storage without the risk of obsolescence.

Why is IFC important in the BIM methodology?

IFC is a standardized and neutral format that facilitates collaboration among architects, engineers, and builders, reducing conversion errors and supporting performance analyses and operational management of the building.

Which software allows for the conversion of 3D models to IFC?

There are several software options that support conversion to IFC, including usBIM.viewer+ which also allows for viewing and modifying IFC files.