diff --git a/src/assets/js/toolbox-data.js b/src/assets/js/toolbox-data.js
index 18581e2..622c033 100644
--- a/src/assets/js/toolbox-data.js
+++ b/src/assets/js/toolbox-data.js
@@ -29,10 +29,10 @@ export const toolList = [
         title: '比例计算',
         iconClass: 'mdi mdi-calculator-variant-outline',
         desc: '按设定的比例计算给出的数值所对应的数值。',
-        createdAt: '',
-        updatedAt: '',
-        version: '0',
-        enabled: false,
+        createdAt: '2024-09-08',
+        updatedAt: '2024-09-08',
+        version: '1',
+        enabled: true,
       },
     ]
   },
diff --git a/src/views/ToolboxView/Calculation/CalcRatio.vue b/src/views/ToolboxView/Calculation/CalcRatio.vue
index 714cdbc..c35906d 100644
--- a/src/views/ToolboxView/Calculation/CalcRatio.vue
+++ b/src/views/ToolboxView/Calculation/CalcRatio.vue
@@ -1,9 +1,171 @@
 <template>
-  <div class="tool-detail-page"></div>
+  <div class="tool-detail-page">
+
+    <!-- 计算模式 -->
+    <n-card size="small" title="计算模式">
+      <n-form-item :show-label="false">
+        <n-select
+          v-model:value="mode"
+          :options="[
+            { label: '1 -> 2', value: '1-to-2' },
+            { label: '2 -> 1', value: '2-to-1' },
+          ]"
+          :on-blur="update"
+        />
+      </n-form-item>
+    </n-card>
+
+    <!-- 小数位数 -->
+    <n-card size="small" title="小数位数">
+      <n-form-item :show-label="false">
+        <n-input-number
+          v-model:value="decimals"
+          :min="0"
+          :max="10"
+          :precision="0"
+          :step="1"
+          :on-blur="update"
+        ></n-input-number>
+      </n-form-item>
+    </n-card>
+
+    <!-- 基础比例 -->
+    <n-card size="small" title="基础比例">
+      <n-form-item :show-label="false">
+        <n-input-number
+          v-model:value="base.a"
+          :min="limit.min"
+          :max="limit.max"
+          :precision="0"
+          :step="1"
+          :on-blur="update"
+        ></n-input-number>
+        <span class="split">:</span>
+        <n-input-number
+          v-model:value="base.b"
+          :min="limit.min"
+          :max="limit.max"
+          :precision="0"
+          :step="1"
+          :on-blur="update"
+        ></n-input-number>
+      </n-form-item>
+    </n-card>
+
+    <!-- 计算比例 -->
+    <n-card size="small" title="计算比例">
+      <n-form-item :show-label="false">
+        <n-input-number
+          v-model:value="calc.a"
+          :disabled="mode === '2-to-1'"
+          :step="1"
+          :on-blur="update"
+        ></n-input-number>
+        <span class="split">:</span>
+        <n-input-number
+          v-model:value="calc.b"
+          :disabled="mode === '1-to-2'"
+          :step="1"
+          :on-blur="update"
+        ></n-input-number>
+      </n-form-item>
+    </n-card>
+
+  </div>
 </template>
 
 <script setup>
+import {
+  bignumber, divide, floor, multiply, number, round,
+} from 'mathjs';
+
+import {
+  NCard,  NFormItem, NInputNumber, NSelect,
+} from 'naive-ui';
+
+import {
+  reactive, ref,
+} from 'vue';
+
+/** 基础比例 */
+const base = reactive({
+  a: 1,
+  b: 1,
+});
+
+/** 计算比例 */
+const calc = reactive({
+  a: 1,
+  b: 1,
+});
+
+/** 小数位数 */
+const decimals = ref(5);
+
+/** 数值范围限制 */
+const limit = {
+  min: -99999999,
+  max: 99999999,
+};
+
+/** 模式 */
+const mode = ref('1-to-2');
+
+/** 计算 */
+function calculate() {
+
+  let { min, max } = limit;
+
+  let useMode = mode.value;
+  let ratio = divide(bignumber(base.a), bignumber(base.b));
+
+  if (useMode === '1-to-2') {
+
+    // 注：只允许整数
+    let a = number(floor(calc.a));
+
+    (a < min) && (a = min);
+    (a > max) && (a = max);
+
+    calc.a = a;
+    calc.b = number(round(divide(bignumber(a), ratio), decimals.value));
+
+  } else if (useMode === '2-to-1') {
+
+    // 注：只允许整数
+    let b = number(floor(calc.b));
+
+    (b < min) && (b = min);
+    (b > max) && (b = max);
+
+    calc.a = number(round(multiply(bignumber(b), ratio), decimals.value));
+    calc.b = b;
+
+  }
+
+}
+
+/** 更新 */
+function update() {
+  calculate();
+}
 </script>
 
 <style lang="less" scoped>
+.tool-detail-page {
+  :deep(.n-input-number) {
+    width: 12em;
+  }
+
+  :deep(.n-select) {
+    width: 12em;
+  }
+}
+
+.split {
+  display: inline-block;
+  width: 2em;
+  font-weight: bold;
+  text-align: center;
+}
 </style>