diff --git a/client/src/modules/inventory/InventoryListPage.tsx b/client/src/modules/inventory/InventoryListPage.tsx
index 57e1cbf..21dad4d 100644
--- a/client/src/modules/inventory/InventoryListPage.tsx
+++ b/client/src/modules/inventory/InventoryListPage.tsx
@@ -109,7 +109,7 @@ export function InventoryListPage() {
                 <th className="px-2 py-2">Type</th>
                 <th className="px-2 py-2">Status</th>
                 <th className="px-2 py-2">UOM</th>
-                <th className="px-2 py-2">Flags</th>
+                <th className="px-2 py-2">Qty</th>
                 <th className="px-2 py-2">BOM</th>
                 <th className="px-2 py-2">Updated</th>
               </tr>
@@ -131,8 +131,8 @@ export function InventoryListPage() {
                   </td>
                   <td className="px-2 py-2 text-muted">{item.unitOfMeasure}</td>
                   <td className="px-2 py-2 text-xs text-muted">
-                    <div>{item.isSellable ? "Sellable" : "Not sellable"}</div>
-                    <div>{item.isPurchasable ? "Purchasable" : "Not purchasable"}</div>
+                    <div>Total {item.onHandQuantity}</div>
+                    <div>Available {item.availableQuantity}</div>
                   </td>
                   <td className="px-2 py-2 text-muted">{item.bomLineCount} lines</td>
                   <td className="px-2 py-2 text-muted">{new Date(item.updatedAt).toLocaleDateString()}</td>
diff --git a/server/src/modules/inventory/service.ts b/server/src/modules/inventory/service.ts
index 93ef6b7..a680467 100644
--- a/server/src/modules/inventory/service.ts
+++ b/server/src/modules/inventory/service.ts
@@ -341,6 +341,23 @@ function buildStockBalances(transactions: InventoryTransactionRecord[], reservat
     );
 }
 
+function calculateSummaryQuantities(
+  transactions: Array<{ transactionType: string; quantity: number }>,
+  reservations: Array<{ status: string; quantity: number }>
+) {
+  const onHandQuantity = transactions.reduce((sum, transaction) => {
+    return sum + getSignedQuantity(transaction.transactionType as InventoryTransactionType, transaction.quantity);
+  }, 0);
+  const reservedQuantity = reservations.reduce((sum, reservation) => {
+    return reservation.status === "ACTIVE" ? sum + reservation.quantity : sum;
+  }, 0);
+
+  return {
+    onHandQuantity,
+    availableQuantity: onHandQuantity - reservedQuantity,
+  };
+}
+
 function mapSummary(record: {
   id: string;
   sku: string;
@@ -351,8 +368,12 @@ function mapSummary(record: {
   isSellable: boolean;
   isPurchasable: boolean;
   updatedAt: Date;
+  inventoryTransactions?: Array<{ transactionType: string; quantity: number }>;
+  reservations?: Array<{ status: string; quantity: number }>;
   _count: { bomLines: number };
 }): InventoryItemSummaryDto {
+  const quantities = calculateSummaryQuantities(record.inventoryTransactions ?? [], record.reservations ?? []);
+
   return {
     id: record.id,
     sku: record.sku,
@@ -362,6 +383,8 @@ function mapSummary(record: {
     unitOfMeasure: record.unitOfMeasure as InventoryUnitOfMeasure,
     isSellable: record.isSellable,
     isPurchasable: record.isPurchasable,
+    onHandQuantity: quantities.onHandQuantity,
+    availableQuantity: quantities.availableQuantity,
     bomLineCount: record._count.bomLines,
     updatedAt: record.updatedAt.toISOString(),
   };
@@ -391,6 +414,14 @@ function mapDetail(record: InventoryDetailRecord): InventoryItemDetailDto {
       isSellable: record.isSellable,
       isPurchasable: record.isPurchasable,
       updatedAt: record.updatedAt,
+      inventoryTransactions: record.inventoryTransactions.map((transaction) => ({
+        transactionType: transaction.transactionType,
+        quantity: transaction.quantity,
+      })),
+      reservations: record.reservations.map((reservation) => ({
+        status: reservation.status,
+        quantity: reservation.quantity,
+      })),
       _count: { bomLines: record.bomLines.length },
     }),
     description: record.description,
@@ -645,6 +676,18 @@ export async function listInventoryItems(filters: InventoryListFilters = {}) {
   const items = await prisma.inventoryItem.findMany({
     where: buildWhereClause(filters),
     include: {
+      inventoryTransactions: {
+        select: {
+          transactionType: true,
+          quantity: true,
+        },
+      },
+      reservations: {
+        select: {
+          status: true,
+          quantity: true,
+        },
+      },
       _count: {
         select: {
           bomLines: true,
diff --git a/shared/src/inventory/types.ts b/shared/src/inventory/types.ts
index 1873ef9..e7e0bd6 100644
--- a/shared/src/inventory/types.ts
+++ b/shared/src/inventory/types.ts
@@ -114,6 +114,8 @@ export interface InventoryItemSummaryDto {
   unitOfMeasure: InventoryUnitOfMeasure;
   isSellable: boolean;
   isPurchasable: boolean;
+  onHandQuantity: number;
+  availableQuantity: number;
   bomLineCount: number;
   updatedAt: string;
 }