diff --git a/ApplicationLibCode/ProjectDataModelCommands/RimcProject.cpp b/ApplicationLibCode/ProjectDataModelCommands/RimcProject.cpp
index 55ececb..d2dc73a 100644
--- a/ApplicationLibCode/ProjectDataModelCommands/RimcProject.cpp
+++ b/ApplicationLibCode/ProjectDataModelCommands/RimcProject.cpp
@@ -55,6 +55,7 @@
 
 #include "opm/input/eclipse/Deck/Deck.hpp"
 #include "opm/input/eclipse/EclipseState/Grid/EclipseGrid.hpp"
+#include "opm/input/eclipse/EclipseState/Grid/NNC.hpp"
 #include "opm/input/eclipse/Parser/ErrorGuard.hpp"
 #include "opm/input/eclipse/Parser/InputErrorAction.hpp"
 #include "opm/input/eclipse/Parser/ParseContext.hpp"
@@ -69,6 +70,57 @@
 #include <memory>
 #include <set>
 
+CAF_PDM_OBJECT_METHOD_SOURCE_INIT( RimProject, RimProject_exportPreparedInputGrid, "exportPreparedInputGrid" );
+
+RimProject_exportPreparedInputGrid::RimProject_exportPreparedInputGrid( caf::PdmObjectHandle* self )
+    : caf::PdmVoidObjectMethod( self )
+{
+    CAF_PDM_InitObject( "Export Prepared Input Grid" );
+    CAF_PDM_InitScriptableFieldNoDefault( &m_path, "Path", "Input Deck Path" );
+    CAF_PDM_InitScriptableFieldNoDefault( &m_outputPath, "OutputPath", "Output EGRID Path" );
+}
+
+std::expected<caf::PdmObjectHandle*, QString> RimProject_exportPreparedInputGrid::execute()
+{
+    QFileInfo input( m_path() );
+    QFileInfo output( m_outputPath() );
+    if ( !input.isAbsolute() || !input.isFile() )
+        return std::unexpected( QString( "The input deck requires an existing absolute file path." ) );
+    if ( !output.isAbsolute() || output.exists() || output.isSymLink() || !output.dir().exists() ||
+         output.suffix().compare( "EGRID", Qt::CaseInsensitive ) != 0 )
+        return std::unexpected( QString( "The output requires a new absolute EGRID path in an existing directory." ) );
+
+    Opm::ErrorGuard errors;
+    try
+    {
+        auto deck = Opm::Parser{}.parseFile( m_path().toStdString(), Opm::ParseContext( Opm::InputErrorAction::THROW_EXCEPTION ), errors );
+        const auto& units = deck.getActiveUnitSystem();
+        if ( units.getType() != Opm::UnitSystem::UnitType::UNIT_TYPE_FIELD )
+            return std::unexpected( QString( "Prepared input grid export requires FIELD units." ) );
+
+        Opm::GridDims dimensions( deck );
+        if ( dimensions.getCartesianSize() > 10000 )
+            return std::unexpected( QString( "Prepared input grids cannot exceed 10000 cells." ) );
+        for ( int size : dimensions.getNXYZ() )
+        {
+            if ( size < 1 || size > 10000 )
+                return std::unexpected( QString( "Prepared input grids require dimensions from 1 through 10000." ) );
+        }
+        std::vector<int> activeCells;
+        if ( deck.hasKeyword( "ACTNUM" ) ) activeCells = deck["ACTNUM"].back().getIntData();
+        if ( !activeCells.empty() && activeCells.size() != dimensions.getCartesianSize() )
+            return std::unexpected( QString( "ACTNUM must contain one value for each grid cell." ) );
+        Opm::EclipseGrid grid( deck, activeCells.empty() ? nullptr : activeCells.data() );
+        grid.save( m_outputPath().toStdString(), false, {}, units );
+    }
+    catch ( const std::exception& error )
+    {
+        errors.clear();
+        return std::unexpected( QString( "Prepared input grid export failed: %1" ).arg( error.what() ) );
+    }
+    return nullptr;
+}
+
 CAF_PDM_OBJECT_METHOD_SOURCE_INIT( RimProject, RimProject_loadPreparedInputGrid, "loadPreparedInputGrid" );
 
 RimProject_loadPreparedInputGrid::RimProject_loadPreparedInputGrid( caf::PdmObjectHandle* self )
diff --git a/ApplicationLibCode/ProjectDataModelCommands/RimcProject.h b/ApplicationLibCode/ProjectDataModelCommands/RimcProject.h
index 902d23f..cd1f1f3 100644
--- a/ApplicationLibCode/ProjectDataModelCommands/RimcProject.h
+++ b/ApplicationLibCode/ProjectDataModelCommands/RimcProject.h
@@ -29,6 +29,19 @@
 
 class Rim3dView;
 
+class RimProject_exportPreparedInputGrid : public caf::PdmVoidObjectMethod
+{
+    CAF_PDM_HEADER_INIT;
+
+public:
+    RimProject_exportPreparedInputGrid( caf::PdmObjectHandle* self );
+    std::expected<caf::PdmObjectHandle*, QString> execute() override;
+
+private:
+    caf::PdmField<QString> m_path;
+    caf::PdmField<QString> m_outputPath;
+};
+
 class RimProject_loadPreparedInputGrid : public caf::PdmObjectCreationMethod
 {
     CAF_PDM_HEADER_INIT;