diff --git a/src/main/java/com/ffii/fpsms/modules/stock/service/StockInLineService.kt b/src/main/java/com/ffii/fpsms/modules/stock/service/StockInLineService.kt
index 15c3073..7fa49d1 100644
--- a/src/main/java/com/ffii/fpsms/modules/stock/service/StockInLineService.kt
+++ b/src/main/java/com/ffii/fpsms/modules/stock/service/StockInLineService.kt
@@ -470,7 +470,12 @@ open class StockInLineService(
         val antValues = byPol.map { (_, silList) ->
             val sil = silList.first()
             val pol = sil.purchaseOrderLine!!
-            val totalQty = silList.sumOf { it.acceptedQty ?: BigDecimal.ZERO }
+            // acceptedQty on StockInLine is in stock unit; M18 ant expects purchase unit qty
+            val totalStockQty = silList.sumOf { it.acceptedQty ?: BigDecimal.ZERO }
+            val itemId = sil.item?.id ?: pol.item?.id
+            val totalQtyInPurchaseUnit = if (itemId != null) {
+                itemUomService.convertStockQtyToPurchaseQty(itemId, totalStockQty)
+            } else totalStockQty
             val unitIdFromDataLog = (pol.m18DataLog?.dataLog?.get("unitId") as? Number)?.toLong()?.toInt()
             val itemName = (sil.item?.name ?: pol.item?.name).orEmpty()  // always non-null for M18 bDesc/bDesc_en
             GoodsReceiptNoteAntValue(
@@ -480,12 +485,12 @@ open class StockInLineService(
                 proId = (sil.item?.m18Id ?: pol.item?.m18Id ?: 0L).toInt(),
                 locId = 155,
                 unitId = unitIdFromDataLog ?: (pol.uom?.m18Id ?: 0L).toInt(),
-                qty = totalQty.toDouble(),
+                qty = totalQtyInPurchaseUnit.toDouble(),
                 up = pol.up?.toDouble() ?: 0.0,
                 amt = CommonUtils.getAmt(
                     up = pol.up ?: BigDecimal.ZERO,
                     discount = pol.m18Discount ?: BigDecimal.ZERO,
-                    qty = totalQty
+                    qty = totalQtyInPurchaseUnit
                 ),
                 beId = beId,
                 flowTypeId = flowTypeId,