diff --git a/src/langs/zh_Hans.txt b/src/langs/zh_Hans.txt
index 3e755c2..68f327e 100644
--- a/src/langs/zh_Hans.txt
+++ b/src/langs/zh_Hans.txt
@@ -190,6 +190,8 @@ Supported Placeholder=支持的占位符
 AriaNg Title=AriaNg 标题
 Current RPC Alias=当前 RPC 别名
 Downloading Count=正在下载数量
+Overall Completed Percent=整体完成进度
+Completed Percent=完成进度
 Waiting Count=正在等待数量
 Stopped Count=已停止数量
 You have disabled notification in your browser. You should change your browser's settings before you enable this function.=您已经在浏览器中禁用通知功能. 如需使用此功能, 请修改您浏览器的设置.
diff --git a/src/langs/zh_Hant.txt b/src/langs/zh_Hant.txt
index ec01f78..2dccf43 100644
--- a/src/langs/zh_Hant.txt
+++ b/src/langs/zh_Hant.txt
@@ -189,6 +189,8 @@ Data has been copied to clipboard.=資料已經複製到剪貼簿中.
 Supported Placeholder=支援的預留位置
 AriaNg Title=AriaNg 標題
 Downloading Count=正在下載數量
+Overall Completed Percent=整體完成進度
+Completed Percent=完成進度
 Current RPC Alias=目前 RPC 別名
 Waiting Count=正在等待數量
 Stopped Count=已停止數量
diff --git a/src/scripts/config/defaultLanguage.js b/src/scripts/config/defaultLanguage.js
index fc7bd7d..f0d478b 100644
--- a/src/scripts/config/defaultLanguage.js
+++ b/src/scripts/config/defaultLanguage.js
@@ -194,6 +194,8 @@
             'AriaNg Title': 'AriaNg Title',
             'Current RPC Alias': 'Current RPC Alias',
             'Downloading Count': 'Downloading Count',
+            'Overall Completed Percent': 'Overall Completed Percent',
+            'Completed Percent': 'Completed Percent',
             'Waiting Count': 'Waiting Count',
             'Stopped Count': 'Stopped Count',
             'You have disabled notification in your browser. You should change your browser\'s settings before you enable this function.': 'You have disabled notification in your browser. You should change your browser\'s settings before you enable this function.',
diff --git a/src/scripts/controllers/main.js b/src/scripts/controllers/main.js
index c9cbffc..3ebe41d 100644
--- a/src/scripts/controllers/main.js
+++ b/src/scripts/controllers/main.js
@@ -8,6 +8,7 @@
         var refreshPageTitle = function () {
             $document[0].title = ariaNgTitleService.getFinalTitleByGlobalStat({
                 globalStat: $scope.globalStat,
+                completedPercent: $rootScope.taskContext.getOverallPercent(),
                 currentRpcProfile: getCurrentRPCProfile()
             });
         };
diff --git a/src/scripts/core/root.js b/src/scripts/core/root.js
index 39d1cef..e73b641 100644
--- a/src/scripts/core/root.js
+++ b/src/scripts/core/root.js
@@ -99,6 +99,27 @@
             list: [],
             selected: {},
             enableSelectAll: false,
+            getOverallPercent: function () {
+                var allCompletedLength = 0;
+                var allTotalLength = 0;
+
+                if (!this.list || this.list.length < 1) {
+                    return 0;
+                }
+
+                for (var i = 0; i < this.list.length; i++) {
+                    var task = this.list[i];
+
+                    allCompletedLength += task.completedLength;
+                    allTotalLength += task.totalLength;
+                }
+
+                if (allCompletedLength <= 0 || allTotalLength <= 0) {
+                    return 0;
+                }
+
+                return allCompletedLength / allTotalLength * 100;
+            },
             getSelectedTaskIds: function () {
                 var result = [];
 
diff --git a/src/scripts/services/ariaNgTitleService.js b/src/scripts/services/ariaNgTitleService.js
index bf3b823..ef99d14 100644
--- a/src/scripts/services/ariaNgTitleService.js
+++ b/src/scripts/services/ariaNgTitleService.js
@@ -34,6 +34,10 @@
                 value = $filter('readableVolume')(value, context.scale);
             }
 
+            if (context.type === 'percent') {
+                value = $filter('percent')(value, context.scale || 2);
+            }
+
             if (context.prefix && !context.noprefix) {
                 value = context.prefix + value;
             }
@@ -74,6 +78,15 @@
             });
         };
 
+        var replaceOverallCompletedPercentCount = function (title, value) {
+            return replacePlaceholders(title, 'completedPercent', {
+                prefix: ariaNgLocalizationService.getLocalizedText('Completed Percent') + ': ',
+                value: value,
+                type: 'percent',
+                suffix: '%'
+            });
+        };
+
         var replaceWaitingCount = function (title, value) {
             return replacePlaceholders(title, 'waiting', {
                 prefix: ariaNgLocalizationService.getLocalizedText('Waiting') + ': ',
@@ -118,6 +131,7 @@
 
                 context = angular.extend({
                     downloadingCount: 0,
+                    completedPercent: 0,
                     waitingCount: 0,
                     stoppedCount: 0,
                     downloadSpeed: 0,
@@ -126,6 +140,7 @@
 
                 title = replaceCurrentRPCAlias(title, context.currentRPCAlias);
                 title = replaceDownloadingCount(title, context.downloadingCount);
+                title = replaceOverallCompletedPercentCount(title, context.completedPercent);
                 title = replaceWaitingCount(title, context.waitingCount);
                 title = replaceStoppedCount(title, context.stoppedCount);
                 title = replaceDownloadSpeed(title, context.downloadSpeed);
@@ -138,6 +153,7 @@
                 var context = {
                     currentRPCAlias: (params && params.currentRpcProfile ? (params.currentRpcProfile.rpcAlias || (params.currentRpcProfile.rpcHost + ':' + params.currentRpcProfile.rpcPort)) : ''),
                     downloadingCount: (params && params.globalStat ? params.globalStat.numActive : 0),
+                    completedPercent: (params && params.completedPercent ? params.completedPercent : 0),
                     waitingCount: (params && params.globalStat ? params.globalStat.numWaiting : 0),
                     stoppedCount: (params && params.globalStat ? params.globalStat.numStopped : 0),
                     downloadSpeed: (params && params.globalStat ? params.globalStat.downloadSpeed : 0),
diff --git a/src/views/settings-ariang.html b/src/views/settings-ariang.html
index b67cf0c..bb3499a 100644
--- a/src/views/settings-ariang.html
+++ b/src/views/settings-ariang.html
@@ -58,6 +58,7 @@
                                ('AriaNg Title' | translate) + ': ${title}<br/>' +
                                ('Current RPC Alias' | translate) + ': ${rpcprofile}<br/>' +
                                ('Downloading Count' | translate) + ': ${downloading}<br/>' +
+                               ('Overall Completed Percent' | translate) + ': ${completedPercent}<br/>' +
                                 ('Waiting Count' | translate) + ': ${waiting}<br/>' +
                                 ('Stopped Count' | translate) + ': ${stopped}<br/>' +
                                 ('Download Speed' | translate) + ': ${downspeed}<br/>' +