# CONVTONURBS Command [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [Commands](Help%20System/GSTARCAD/2027/Commands/(Commands).md) → [C](Help%20System/GSTARCAD/2027/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: ```  --- **Related References：** - [Commands about Working with 3D Models (GstarCAD 2026)](../../../2026/Commands/00%20Command%20Groups/Commands%20about%20Working%20with%203D%20Models.md) **Related Tasks：** - [To Convert a Solid Into a NURBS (GstarCAD 2026)](../../../2026/Commands/01%20Procedures/To%20Convert%20a%20Solid%20Into%20a%20NURBS.md) - [To Convert a Mesh Object Into a NURBS (GstarCAD 2026)](../../../2026/Commands/01%20Procedures/To%20Convert%20a%20Mesh%20Object%20Into%20a%20NURBS.md) --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/commandReferences_C/CONVTONURBS.html) · © Gstarsoft Co., Ltd.