Calculating the surface area of a mesh is a useful measurement when working with 3D meshes across processes and disciplines. Luckily, Blender has implemented a quick solution to access this information.
1. Import your 3D model into Blender using File > Import.
2. Once your mesh is loaded up, turn on the Mesh: 3D Print Toolbox Add-on by going to Edit > Preferences > Add-ons.
3. Now that the add-on has been activated, head back to the mesh view and select your object.
4. Head to the sidebar and open the 3D-Print pane. Under Analyze, click Area and the surface area of your mesh will be revealed!