# CONVTONURBS Command [GstarCAD 2022](Help%20System/GSTARCAD/2022/Index.md) → [Commands](Help%20System/GSTARCAD/2022/Commands/(Commands).md) → [C](Help%20System/GSTARCAD/2022/Commands/C/(C).md) ## Function Description: This command is used to convert 3D solids and surfaces into NURBS surfaces. To convert meshes to NURBS surfaces, convert them to a solid or surface first with CONVTOSOLID or CONVTOSURFACE and then convert them to NURBS surfaces. ## Command Access: > **Icon:** >  > **Menu:** Modify \> Surface Editing \> Convert to NURBS > **Ribbon:** Surface \> CV \> Convert to NURBS > **Toolbar:** / > **Command:** CONVTONURBS > **Alias:** / ## Command Prompts: Select objects to convert to: