diff --git a/frontend/src/composables/useKitCost.js b/frontend/src/composables/useKitCost.js
index 3ddf351..f3f46a2 100644
--- a/frontend/src/composables/useKitCost.js
+++ b/frontend/src/composables/useKitCost.js
@@ -24,12 +24,14 @@ export function useKitCost() {
   // Calculate per-drop costs for a kit
   function calcKitPerDrop(kit) {
     const resolved = kit.oils.map(name => resolveOilName(name))
-    // Sum of bottle prices for all oils in kit
+    const bc = kit.bottleCount || {} // e.g. { '椰子油': 2.57 }
+    // Sum of bottle prices for all oils in kit (accounting for multiple bottles)
     let totalBottlePrice = 0
     const oilBottlePrices = {}
     for (const name of resolved) {
       const meta = oils.oilsMeta[name]
-      const bp = meta ? meta.bottlePrice : 0
+      const count = bc[name] || 1
+      const bp = meta ? meta.bottlePrice * count : 0
       oilBottlePrices[name] = bp
       totalBottlePrice += bp
     }
@@ -41,10 +43,11 @@ export function useKitCost() {
     const perDrop = {}
     for (const name of resolved) {
       const meta = oils.oilsMeta[name]
+      const count = bc[name] || 1
       const bp = oilBottlePrices[name]
       const kitCostForOil = (bp / totalBottlePrice) * effectivePrice
-      const drops = meta ? meta.dropCount : 1
-      perDrop[name] = drops > 0 ? kitCostForOil / drops : 0
+      const totalDrops = meta ? meta.dropCount * count : 1
+      perDrop[name] = totalDrops > 0 ? kitCostForOil / totalDrops : 0
     }
     return perDrop
   }
diff --git a/frontend/src/config/kits.js b/frontend/src/config/kits.js
index 6f75cc4..8b173d5 100644
--- a/frontend/src/config/kits.js
+++ b/frontend/src/config/kits.js
@@ -1,5 +1,6 @@
 // doTERRA 套装配置
 // 价格和内容更新频率低，手动维护即可
+// bottleCount: 某种油在套装中的瓶数（用于成本分摊和可做次数计算，默认1）
 export const KITS = [
   {
     id: 'aroma',
@@ -52,5 +53,7 @@ export const KITS = [
       '柑橘清新', '顺畅呼吸', '净化清新', '赋活呼吸', '天然防护',
       '椰子油',
     ],
+    // 115mL×1 + 30mL×6 = 295mL, 标准瓶115mL, 约2.57瓶
+    bottleCount: { '椰子油': 2.57 },
   },
 ]