diff --git a/src/app/[locale]/(protected)/sales/order-management-sales/[id]/page.tsx b/src/app/[locale]/(protected)/sales/order-management-sales/[id]/page.tsx
index fa62a077..bac7c48a 100644
--- a/src/app/[locale]/(protected)/sales/order-management-sales/[id]/page.tsx
+++ b/src/app/[locale]/(protected)/sales/order-management-sales/[id]/page.tsx
@@ -72,6 +72,27 @@ import {
 } from "@/components/orders";
 import { sendSalesOrderNotification } from "@/lib/actions/fcm";
 
+/**
+ * 수량 포맷 함수
+ * - EA, SET, PCS 등 개수 단위: 정수로 표시
+ * - M, M2, KG, L 등 측정 단위: 소수점 이하 불필요한 0 제거
+ */
+function formatQuantity(quantity: number, unit?: string): string {
+  const countableUnits = ["EA", "SET", "PCS", "개", "세트", "BOX", "ROLL"];
+  const upperUnit = (unit || "").toUpperCase();
+
+  if (countableUnits.includes(upperUnit)) {
+    // 개수 단위는 정수로 반올림
+    return Math.round(quantity).toLocaleString();
+  }
+
+  // 측정 단위는 소수점 4자리까지 반올림 후 불필요한 0 제거
+  const rounded = Math.round(quantity * 10000) / 10000;
+  return rounded.toLocaleString(undefined, {
+    minimumFractionDigits: 0,
+    maximumFractionDigits: 4
+  });
+}
 
 // 상태 뱃지 헬퍼
 function getOrderStatusBadge(status: OrderStatus) {
@@ -598,7 +619,7 @@ export default function OrderDetailPage() {
                                     </TableCell>
                                     <TableCell>{item.itemName}</TableCell>
                                     <TableCell>{item.spec || "-"}</TableCell>
-                                    <TableCell className="text-center">{item.quantity}</TableCell>
+                                    <TableCell className="text-center">{formatQuantity(item.quantity, item.unit)}</TableCell>
                                     <TableCell className="text-center">{item.unit || "-"}</TableCell>
                                     <TableCell className="text-right">
                                       {formatAmount(item.unitPrice || 0)}원
@@ -659,7 +680,7 @@ export default function OrderDetailPage() {
                                 </TableCell>
                                 <TableCell>{item.itemName}</TableCell>
                                 <TableCell>{item.spec || "-"}</TableCell>
-                                <TableCell className="text-center">{item.quantity}</TableCell>
+                                <TableCell className="text-center">{formatQuantity(item.quantity, item.unit)}</TableCell>
                                 <TableCell className="text-center">{item.unit || "-"}</TableCell>
                                 <TableCell className="text-right">
                                   {formatAmount(item.unitPrice || 0)}원
@@ -704,7 +725,7 @@ export default function OrderDetailPage() {
                           </TableCell>
                           <TableCell>{item.itemName}</TableCell>
                           <TableCell>{item.spec || "-"}</TableCell>
-                          <TableCell className="text-center">{item.quantity}</TableCell>
+                          <TableCell className="text-center">{formatQuantity(item.quantity, item.unit)}</TableCell>
                           <TableCell className="text-center">{item.unit || "-"}</TableCell>
                           <TableCell className="text-right">
                             {formatAmount(item.unitPrice || 0)}원
@@ -736,7 +757,7 @@ export default function OrderDetailPage() {
               </div>
               <div className="flex items-center gap-4 text-sm">
                 <span className="text-muted-foreground">할인율:</span>
-                <span className="w-32 text-right">{order.discountRate || 0}%</span>
+                <span className="w-32 text-right">{Number.isInteger(order.discountRate || 0) ? (order.discountRate || 0) : Math.round(order.discountRate || 0)}%</span>
               </div>
               <div className="flex items-center gap-4 text-lg font-semibold">
                 <span>총금액:</span>
diff --git a/src/components/orders/documents/ContractDocument.tsx b/src/components/orders/documents/ContractDocument.tsx
index 76814417..df2bb61d 100644
--- a/src/components/orders/documents/ContractDocument.tsx
+++ b/src/components/orders/documents/ContractDocument.tsx
@@ -207,11 +207,11 @@ export function ContractDocument({
               <td className="p-2 bg-gray-100 border-r border-gray-300 w-32">공급가액</td>
               <td className="p-2 text-right border-r border-gray-300">{formatAmount(subtotal)}</td>
               <td className="p-2 bg-gray-100 border-r border-gray-300 w-32">할인율</td>
-              <td className="p-2 text-right">{discountRate}%</td>
+              <td className="p-2 text-right">{Number.isInteger(discountRate) ? discountRate : Math.round(discountRate)}%</td>
             </tr>
             <tr className="border-b border-gray-300">
               <td className="p-2 bg-gray-100 border-r border-gray-300">할인액</td>
-              <td className="p-2 text-right border-r border-gray-300 text-red-600">-{formatAmount(discountAmount)}</td>
+              <td className="p-2 text-right border-r border-gray-300 text-red-600">{discountAmount > 0 ? `-${formatAmount(discountAmount)}` : formatAmount(discountAmount)}</td>
               <td className="p-2 bg-gray-100 border-r border-gray-300">할인 후 공급가액</td>
               <td className="p-2 text-right">{formatAmount(afterDiscount)}</td>
             </tr>