diff --git a/Userland/Applications/PartitionEditor/PartitionModel.cpp b/Userland/Applications/PartitionEditor/PartitionModel.cpp
index 3b03c998e7..6d5d7169d1 100644
--- a/Userland/Applications/PartitionEditor/PartitionModel.cpp
+++ b/Userland/Applications/PartitionEditor/PartitionModel.cpp
@@ -20,6 +20,8 @@ String PartitionModel::column_name(int column) const
         return "Start Block";
     case Column::EndBlock:
         return "End Block";
+    case Column::TotalBlocks:
+        return "Total Blocks";
     default:
         VERIFY_NOT_REACHED();
     }
@@ -43,6 +45,8 @@ GUI::Variant PartitionModel::data(GUI::ModelIndex const& index, GUI::ModelRole r
             return partition.start_block();
         case Column::EndBlock:
             return partition.end_block();
+        case Column::TotalBlocks:
+            return partition.end_block() - partition.start_block() + 1;
         default:
             VERIFY_NOT_REACHED();
         }
diff --git a/Userland/Applications/PartitionEditor/PartitionModel.h b/Userland/Applications/PartitionEditor/PartitionModel.h
index 65be6dac7f..268c49c1b9 100644
--- a/Userland/Applications/PartitionEditor/PartitionModel.h
+++ b/Userland/Applications/PartitionEditor/PartitionModel.h
@@ -17,6 +17,7 @@ public:
         Partition,
         StartBlock,
         EndBlock,
+        TotalBlocks,
         __Count,
     };