diff --git a/pages/[lang]/rotations.ts b/pages/[lang]/rotations.ts
deleted file mode 100644
index 01b9ed1d..00000000
--- a/pages/[lang]/rotations.ts
+++ /dev/null
@@ -1,4 +0,0 @@
-import {Constructing} from '../../src/components/pages/constructing';
-
-
-export default Constructing;
diff --git a/pages/[lang]/tools/enmity/index.ts b/pages/[lang]/tools/enmity/index.ts
new file mode 100644
index 00000000..38c2b8e9
--- /dev/null
+++ b/pages/[lang]/tools/enmity/index.ts
@@ -0,0 +1,4 @@
+import {EnmityCalculator} from '../../../../src/components/pages/calc/enmity/main';
+
+
+export default EnmityCalculator;
diff --git a/pages/[lang]/tools/rotation/index.ts b/pages/[lang]/tools/rotation/index.ts
new file mode 100644
index 00000000..98753a32
--- /dev/null
+++ b/pages/[lang]/tools/rotation/index.ts
@@ -0,0 +1,4 @@
+import {Constructing} from '../../../../src/components/pages/constructing';
+
+
+export default Constructing;
diff --git a/src/components/pages/calc/enmity/main.tsx b/src/components/pages/calc/enmity/main.tsx
new file mode 100644
index 00000000..660ebca2
--- /dev/null
+++ b/src/components/pages/calc/enmity/main.tsx
@@ -0,0 +1,6 @@
+import React from 'react';
+
+
+export const EnmityCalculator = () => {
+  return <>WIP</>;
+};
diff --git a/src/const/path/definitions.ts b/src/const/path/definitions.ts
index fc3dba98..650a9373 100644
--- a/src/const/path/definitions.ts
+++ b/src/const/path/definitions.ts
@@ -50,7 +50,8 @@ export enum GeneralPath {
   SKILL_SUP = '/skill/sup',
   STORY = '/story',
   // Tools
-  ROTATION_CALC = '/rotations',
+  ROTATION_CALC = '/tools/rotation',
+  ENMITY_CALC = '/tools/enmity',
   // Others
   UPDATE_UNIT_NAME_REF = '/name',
   // Not game related
diff --git a/src/i18n/translations/cht/translation.ts b/src/i18n/translations/cht/translation.ts
index 1be17421..b407de71 100644
--- a/src/i18n/translations/cht/translation.ts
+++ b/src/i18n/translations/cht/translation.ts
@@ -694,6 +694,12 @@ export const translation: TranslationStruct = {
           description: '設定物件名稱的頁面。',
         },
       },
+      calc: {
+        enmity: {
+          title: '背水倍率計算機',
+          description: '計算背水倍率在特定 HP,或是要達到特定背水倍率所需要的 HP 的工具。',
+        },
+      },
       story: {
         unit: {
           title: '【角色故事】{{unitName}}',
diff --git a/src/i18n/translations/definition.ts b/src/i18n/translations/definition.ts
index 7983a41c..683a9e98 100644
--- a/src/i18n/translations/definition.ts
+++ b/src/i18n/translations/definition.ts
@@ -551,6 +551,9 @@ export type TranslationStruct = {
         info: PageMetaTranslations,
         name: PageMetaTranslations,
       },
+      calc: {
+        enmity: PageMetaTranslations,
+      },
       story: {
         unit: PageMetaTranslations,
       }
diff --git a/src/i18n/translations/en/translation.ts b/src/i18n/translations/en/translation.ts
index fd9ad633..33cfb27b 100644
--- a/src/i18n/translations/en/translation.ts
+++ b/src/i18n/translations/en/translation.ts
@@ -741,6 +741,13 @@ export const translation: TranslationStruct = {
           description: 'Page to configure the custom unit names.',
         },
       },
+      calc: {
+        enmity: {
+          title: 'Enmity Mod Calculator',
+          description: 'Tool to calculate the enmity mod at a certain HP level, ' +
+            'or the HP level required for a certain enmity mod.',
+        },
+      },
       story: {
         unit: {
           title: '【Unit Story】{{unitName}}',
diff --git a/src/i18n/translations/jp/translation.ts b/src/i18n/translations/jp/translation.ts
index ae8fc91a..1fbccd57 100644
--- a/src/i18n/translations/jp/translation.ts
+++ b/src/i18n/translations/jp/translation.ts
@@ -699,6 +699,12 @@ export const translation: TranslationStruct = {
           description: 'ユニット名前を設定する。',
         },
       },
+      calc: {
+        enmity: {
+          title: 'TBA',
+          description: 'TBA',
+        },
+      },
       story: {
         unit: {
           title: '【ユニットストーリー】{{unitName}}',
diff --git a/src/utils/meta/translations.ts b/src/utils/meta/translations.ts
index df0ac2a3..caa2cc90 100644
--- a/src/utils/meta/translations.ts
+++ b/src/utils/meta/translations.ts
@@ -32,6 +32,7 @@ export const metaTransFunctions: { [path in PagePath]: GetTranslationFunction<Pa
   [GeneralPath.ABOUT]: (t) => t.meta.inUse.about,
   [GeneralPath.SPECIAL_THANKS]: (t) => t.meta.inUse.thanks,
   [GeneralPath.UPDATE_UNIT_NAME_REF]: (t) => t.meta.inUse.unit.name,
+  [GeneralPath.ENMITY_CALC]: (t) => t.meta.inUse.calc.enmity,
   [AuthPath.SIGN_IN]: (t) => t.meta.inUse.auth.signIn,
   // Constructing paths
   [GeneralPath.SKILL_SUP]: (t) => t.meta.temp.constructing,