diff --git a/pcbnew/board_stackup_manager/class_board_stackup.cpp b/pcbnew/board_stackup_manager/class_board_stackup.cpp
index 4b56afe1f2..bf3f311a6b 100644
--- a/pcbnew/board_stackup_manager/class_board_stackup.cpp
+++ b/pcbnew/board_stackup_manager/class_board_stackup.cpp
@@ -282,7 +282,7 @@ wxString BOARD_STACKUP_ITEM::FormatEpsilonR( int aDielectricSubLayer ) const
 {
     // return a wxString to print/display Epsilon R
     wxString txt;
-    txt.Printf( "%.1f", GetEpsilonR( aDielectricSubLayer ) );
+    txt.Printf( "%.2f", GetEpsilonR( aDielectricSubLayer ) );
     return txt;
 }
 
diff --git a/pcbnew/board_stackup_manager/panel_board_stackup.cpp b/pcbnew/board_stackup_manager/panel_board_stackup.cpp
index c688cbe172..859d3f32a5 100644
--- a/pcbnew/board_stackup_manager/panel_board_stackup.cpp
+++ b/pcbnew/board_stackup_manager/panel_board_stackup.cpp
@@ -442,7 +442,7 @@ void PANEL_SETUP_BOARD_STACKUP::synchronizeWithBoard( bool aFullSync )
         if( item->HasEpsilonRValue() )
         {
             wxString txt;
-            txt.Printf( "%.1f", item->GetEpsilonR( sub_item ) );
+            txt.Printf( "%.2f", item->GetEpsilonR( sub_item ) );
             wxTextCtrl* textCtrl = dynamic_cast<wxTextCtrl*>( ui_row_item.m_EpsilonCtrl );
 
             if( textCtrl )
@@ -697,7 +697,7 @@ BOARD_STACKUP_ROW_UI_ITEM PANEL_SETUP_BOARD_STACKUP::createRowData( int aRow,
     if( item->HasEpsilonRValue() )
     {
         wxString txt;
-        txt.Printf( "%.1f", item->GetEpsilonR( aSublayerIdx ) );
+        txt.Printf( "%.2f", item->GetEpsilonR( aSublayerIdx ) );
         wxTextCtrl* textCtrl = new wxTextCtrl( m_scGridWin, wxID_ANY, wxEmptyString,
                                                wxDefaultPosition, m_numericFieldsSize );
         textCtrl->SetValue( txt );