diff --git a/src/pages/product/ProductStockDetail.vue b/src/pages/product/ProductStockDetail.vue
index c0c5a32..ad36a8a 100644
--- a/src/pages/product/ProductStockDetail.vue
+++ b/src/pages/product/ProductStockDetail.vue
@@ -55,6 +55,7 @@
 						</div>
 					</template>
 				</t-cell>
+				<product-stock-package-summary :sku="sku" :stock="stock" />
 				<t-cell title="查看库存流水" arrow @click="openRecordList" />
 				<t-cell v-if="0 < Number(stock.reservedQuantity || 0)" title="查看库存预占流水" arrow @click="openReservedRecordList" />
 			</t-cell-group>
@@ -100,6 +101,7 @@ import { shallowRef } from "vue";
 import { useUserStore } from "timi-web-api";
 import ProductAPI from "@/api/ProductAPI";
 import ProductProfile from "@/pages/product/component/ProductProfile.vue";
+import ProductStockPackageSummary from "@/pages/product/component/ProductStockPackageSummary.vue";
 import ProductStockOperationPopup from "@/pages/product/ProductStockOperationPopup.vue";
 import { useNavBarStore } from "@/store/navBarStore";
 import type { Product, ProductSku, ProductStock, ProductSkuUnit, StockOperationType } from "@/types/Product";
diff --git a/src/pages/product/component/ProductStockPackageSummary.vue b/src/pages/product/component/ProductStockPackageSummary.vue
new file mode 100644
index 0000000..e7a9337
--- /dev/null
+++ b/src/pages/product/component/ProductStockPackageSummary.vue
@@ -0,0 +1,78 @@
+<template>
+	<template v-if="packageUnits.length">
+		<t-cell class="packages" title="整包装换算">
+			<template #note>
+				<div class="options" role="group" aria-label="选择整包装换算单位">
+					<t-button
+						v-for="unit in packageUnits"
+						:key="unit.id"
+						size="extra-small"
+						:theme="selectedUnit?.id === unit.id ? 'primary' : 'default'"
+						:variant="selectedUnit?.id === unit.id ? 'base' : 'outline'"
+						:aria-label="`按${unit.name || '未命名单位'}换算`"
+						:aria-pressed="selectedUnit?.id === unit.id"
+						@click="selectedUnitId = unit.id || ''"
+					>
+						<span v-text="`按${unit.name || '未命名单位'}`" />
+					</t-button>
+				</div>
+			</template>
+		</t-cell>
+		<t-cell title="库存折合" :note="summary.onHand" />
+		<t-cell title="可用折合" :note="summary.available" />
+	</template>
+</template>
+
+<script setup lang="ts">
+import type { ProductSku, ProductStock } from "@/types/Product";
+import { splitBaseQuantityIntoPackages } from "@/utils/package";
+
+const props = defineProps<{ sku: ProductSku; stock: ProductStock }>();
+
+// ---------- 整包装换算 ----------
+
+const selectedUnitId = ref("");
+const baseUnits = computed(() => (props.sku.unitList || []).filter(unit => unit.isBase));
+const packageUnits = computed(() => (props.sku.unitList || [])
+	.filter(unit => unit.id && !unit.isBase && 1 < Number(unit.baseQuantityPerUnit))
+	.sort((left, right) => Number(right.baseQuantityPerUnit) - Number(left.baseQuantityPerUnit)));
+const selectedUnit = computed(() => packageUnits.value.find(unit => unit.id === selectedUnitId.value) || packageUnits.value[0]);
+const summary = computed(() => ({
+	onHand: getSummaryText(props.stock.onHandQuantity),
+	available: getSummaryText(props.stock.availableQuantity)
+}));
+
+/** 使用原始基础库存换算，保留基础单位余数，异常数据不按零库存展示。 */
+function getSummaryText(quantity?: number | string): string {
+	const baseUnit = baseUnits.value[0];
+	const unit = selectedUnit.value;
+	if (quantity === undefined || baseUnits.value.length !== 1 || !baseUnit?.name
+		|| Number(baseUnit.baseQuantityPerUnit) !== 1 || !unit?.name) {
+		return "无法换算";
+	}
+	const result = splitBaseQuantityIntoPackages(quantity, unit.baseQuantityPerUnit);
+	if (!result) {
+		return "无法换算";
+	}
+	const parts: string[] = [];
+	if (result.whole !== "0") {
+		parts.push(`${result.whole} ${unit.name}`);
+	}
+	if (result.remainder !== "0" || !parts.length) {
+		parts.push(`${result.remainder} ${baseUnit.name}`);
+	}
+	return parts.join(" ");
+}
+</script>
+
+<style scoped lang="less">
+.packages {
+	.options {
+		--td-button-border-radius: .5rem;
+
+		gap: .5rem;
+		display: flex;
+		flex-wrap: wrap;
+	}
+}
+</style>
diff --git a/src/utils/package.ts b/src/utils/package.ts
index 5dc73e9..1ed47b1 100644
--- a/src/utils/package.ts
+++ b/src/utils/package.ts
@@ -100,6 +100,29 @@ export function convertBaseQuantityToPackageQuantity(baseQuantity: number | stri
 	return formatDecimal(rounded, 3, 3);
 }
 
+/** 将非负基础数量精确拆分为整包装和基础单位余数，不对余数取整。 */
+export function splitBaseQuantityIntoPackages(baseQuantity: number | string, baseQuantityPerUnit: number | string): { whole: string; remainder: string } | undefined {
+	const quantityParts = toDecimalParts(baseQuantity, 3);
+	const unitParts = toDecimalParts(baseQuantityPerUnit, 6);
+	if (!quantityParts || !unitParts) {
+		return undefined;
+	}
+	const scale = Math.max(quantityParts.scale, unitParts.scale);
+	const factor = 10n ** BigInt(scale);
+	const quantity = quantityParts.value * 10n ** BigInt(scale - quantityParts.scale);
+	const unit = unitParts.value * 10n ** BigInt(scale - unitParts.scale);
+	if (unit <= factor) {
+		return undefined;
+	}
+	const remainder = quantity % unit;
+	const integer = (remainder / factor).toString();
+	const fraction = (remainder % factor).toString().padStart(scale, "0").replace(/0+$/, "");
+	return {
+		whole: (quantity / unit).toString(),
+		remainder: fraction ? `${integer}.${fraction}` : integer
+	};
+}
+
 /** 精确相加两个最多三位小数的数量。 */
 export function addPackageQuantity(left: number | string, right: number | string): string | undefined {
 	const leftParts = toQuantityParts(left);