diff --git a/backend/internal/modules/order/pricing.go b/backend/internal/modules/order/pricing.go
index 1e19461..844715c 100644
--- a/backend/internal/modules/order/pricing.go
+++ b/backend/internal/modules/order/pricing.go
@@ -63,10 +63,12 @@ func estimateOrderDurationHours(snapshot datatypes.JSON) int {
 	if days <= 0 {
 		return internalOrderHours
 	}
-	hours := int(math.Round(days * 24))
-	if hours <= 0 {
-		return internalOrderHours
+	// 不足整天按整天向上取整，例如 1.3 / 1.7 天均按 2 天计
+	daysCeil := int(math.Ceil(days))
+	if daysCeil < 1 {
+		daysCeil = 1
 	}
+	hours := daysCeil * 24
 	return hours
 }
 
diff --git a/backend/internal/modules/order/repository_integration_test.go b/backend/internal/modules/order/repository_integration_test.go
index 959eaaa..4556b23 100644
--- a/backend/internal/modules/order/repository_integration_test.go
+++ b/backend/internal/modules/order/repository_integration_test.go
@@ -373,9 +373,10 @@ func TestEstimateOrderDurationHoursFromSnapshot(t *testing.T) {
 		}
 	}`))
 
+	// 165M / 10M = 16.5 天 → 向上取整 17 天 = 408 小时
 	hours := estimateOrderDurationHours(snapshot)
-	if hours != 396 {
-		t.Fatalf("hours = %d, want 396", hours)
+	if hours != 408 {
+		t.Fatalf("hours = %d, want 408", hours)
 	}
 }
 
@@ -387,9 +388,39 @@ func TestEstimateOrderDurationHoursFromServerSnapshot(t *testing.T) {
 		}
 	}`))
 
+	// 105M / 10M = 10.5 天 → 向上取整 11 天 = 264 小时
 	hours := estimateOrderDurationHours(snapshot)
-	if hours != 252 {
-		t.Fatalf("hours = %d, want 252", hours)
+	if hours != 264 {
+		t.Fatalf("hours = %d, want 264", hours)
+	}
+}
+
+func TestEstimateOrderDurationHoursCeilsFractionalDays(t *testing.T) {
+	// 13M / 10M = 1.3 天 → 2 天 = 48 小时
+	snapshot13 := datatypes.JSON([]byte(`{
+		"haf_coin_amount": 13000000,
+		"asset_summary": {"daily_loss_m": 10}
+	}`))
+	if hours := estimateOrderDurationHours(snapshot13); hours != 48 {
+		t.Fatalf("1.3 days hours = %d, want 48", hours)
+	}
+
+	// 17M / 10M = 1.7 天 → 2 天 = 48 小时
+	snapshot17 := datatypes.JSON([]byte(`{
+		"haf_coin_amount": 17000000,
+		"asset_summary": {"daily_loss_m": 10}
+	}`))
+	if hours := estimateOrderDurationHours(snapshot17); hours != 48 {
+		t.Fatalf("1.7 days hours = %d, want 48", hours)
+	}
+
+	// 整天天数不放大：20M / 10M = 2 天 = 48 小时
+	snapshot20 := datatypes.JSON([]byte(`{
+		"haf_coin_amount": 20000000,
+		"asset_summary": {"daily_loss_m": 10}
+	}`))
+	if hours := estimateOrderDurationHours(snapshot20); hours != 48 {
+		t.Fatalf("2.0 days hours = %d, want 48", hours)
 	}
 }
 
@@ -472,8 +503,8 @@ func TestConfirmReceiveRecalculatesEstimatedDuration(t *testing.T) {
 	if err := db.First(&saved, order.ID).Error; err != nil {
 		t.Fatalf("load order failed: %v", err)
 	}
-	if saved.EstimatedDurationHours != 396 {
-		t.Fatalf("EstimatedDurationHours = %d, want 396", saved.EstimatedDurationHours)
+	if saved.EstimatedDurationHours != 408 {
+		t.Fatalf("EstimatedDurationHours = %d, want 408", saved.EstimatedDurationHours)
 	}
 	if saved.RentedAt == nil || saved.RentedAt.After(time.Now()) {
 		t.Fatalf("RentedAt not set correctly: %#v", saved.RentedAt)
@@ -650,8 +681,8 @@ func TestAdminResetReturnOverdueRecalculatesDuration(t *testing.T) {
 	if saved.HandoffStatus != handoffStatusReceived {
 		t.Fatalf("handoff status = %q, want %q", saved.HandoffStatus, handoffStatusReceived)
 	}
-	if saved.EstimatedDurationHours != 252 {
-		t.Fatalf("EstimatedDurationHours = %d, want 252", saved.EstimatedDurationHours)
+	if saved.EstimatedDurationHours != 264 {
+		t.Fatalf("EstimatedDurationHours = %d, want 264", saved.EstimatedDurationHours)
 	}
 	if saved.RentedAt == nil || !saved.RentedAt.Equal(rentedAt) {
 		t.Fatalf("RentedAt = %#v, want original %v", saved.RentedAt, rentedAt)
diff --git a/frontend/src/shared/utils/listingDisplay.ts b/frontend/src/shared/utils/listingDisplay.ts
index 8ef6b35..94e368f 100644
--- a/frontend/src/shared/utils/listingDisplay.ts
+++ b/frontend/src/shared/utils/listingDisplay.ts
@@ -307,7 +307,8 @@ export function getEstimatedRentalDays(item: Listing) {
 export function formatEstimatedRentalDuration(item: Listing) {
   const days = getEstimatedRentalDays(item)
   if (days <= 0) return '--'
-  return `${Math.max(1, Math.round(days))}天`
+  // 不足整天按整天向上取整，与后端 estimateOrderDurationHours 一致
+  return `${Math.max(1, Math.ceil(days))}天`
 }
 
 export function readAssetString(item: Listing, key: string) {