# Grdecl format to vtu/vti

**URL:** <https://discourse.opengeosys.org/t/grdecl-format-to-vtu-vti/1699>\
**Category:** Help & Support\
**Tags:** ogs5-input-files\
**Created:** [September 23, 2025, 10:45am UTC](https://discourse.opengeosys.org/t/grdecl-format-to-vtu-vti/1699 "2025-09-23T10:45:59Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Iman\_Oraki](https://discourse.opengeosys.org/user_avatar/discourse.opengeosys.org/iman_oraki/32/1408_2.png) [@Iman\_Oraki](https://discourse.opengeosys.org/u/Iman_Oraki)\
**Post date:** [September 23, 2025, 10:45am UTC](https://discourse.opengeosys.org/t/grdecl-format-to-vtu-vti/1699/1 "2025-09-23T10:45:59Z")

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Hello Everyone. There was a previous question in 2023 ( [How to use grdecl or zmap grid / or how to convert them to msh or vtu - OpenGeoSys Community](https://discourse.opengeosys.org/t/how-to-use-grdecl-or-zmap-grid-or-how-to-convert-them-to-msh-or-vtu/1268)) but I was wondering if there is “any way, method or technique” to convert a grdecl file into a vtu or vti format or as close as possible?

Regards,  
Iman

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**Author:** ![chleh](https://discourse.opengeosys.org/user_avatar/discourse.opengeosys.org/chleh/32/854_2.png) [@chleh](https://discourse.opengeosys.org/u/chleh)\
**Post date:** [September 23, 2025, 11:15am UTC](https://discourse.opengeosys.org/t/grdecl-format-to-vtu-vti/1699/2 "2025-09-23T11:15:08Z")

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Hello Iman,

I’m not aware of such a tooling. And I don’t know the grdecl format.

Could it be that there is some confusion of OpenGeoSys (OGS, us) and OpenGoSim (PFLOTRAN-OGS)? At least on the OpenGoSim webpage they mention that format: [GRDECL grids — PFLOTRAN documentation](https://docs.opengosim.com/manual/input_deck/grid/grdecl/). Maybe you should take a look at that page. The two projects are not related at all.

Best regards,  
Christoph