diff --git a/doc/changelog.txt b/doc/changelog.txt
index f98bc26a..81b9767d 100644
--- a/doc/changelog.txt
+++ b/doc/changelog.txt
@@ -14,6 +14,7 @@ Changes:
 - checking: Disable URL length warning for data: URLs.
 - installation: Check requirement for Python requests >= 2.2.0.
   Closes: GH bug #478
+- logging: Display downloaded bytes.
 
 Fixes:
 - checking: Fix internal errors in debug output.
diff --git a/linkcheck/checker/urlbase.py b/linkcheck/checker/urlbase.py
index 47f87321..cd2968f1 100644
--- a/linkcheck/checker/urlbase.py
+++ b/linkcheck/checker/urlbase.py
@@ -631,6 +631,8 @@ class UrlBase (object):
             if self.size == 0:
                 self.add_warning(_("Content size is zero."),
                              tag=WARN_URL_CONTENT_SIZE_ZERO)
+            else:
+                self.aggregate.add_downloaded_bytes(self.size)
         return self.data
 
     def read_content(self):
diff --git a/linkcheck/director/__init__.py b/linkcheck/director/__init__.py
index 6bbaab57..eba3bef4 100644
--- a/linkcheck/director/__init__.py
+++ b/linkcheck/director/__init__.py
@@ -124,7 +124,7 @@ def check_urls (aggregate):
             aggregate.start_threads()
         check_url(aggregate)
         aggregate.finish()
-        aggregate.logger.end_log_output()
+        aggregate.logger.end_log_output(aggregate.downloaded_bytes)
     except LinkCheckerInterrupt:
         raise
     except KeyboardInterrupt:
@@ -178,11 +178,11 @@ def abort (aggregate):
         try:
             aggregate.abort()
             aggregate.finish()
-            aggregate.logger.end_log_output()
+            aggregate.logger.end_log_output(aggregate.downloaded_bytes)
             break
         except KeyboardInterrupt:
             log.warn(LOG_CHECK, _("user abort; force shutdown"))
-            aggregate.logger.end_log_output()
+            aggregate.logger.end_log_output(aggregate.downloaded_bytes)
             abort_now()
 
 
diff --git a/linkcheck/director/aggregator.py b/linkcheck/director/aggregator.py
index 5cf43414..7855916a 100644
--- a/linkcheck/director/aggregator.py
+++ b/linkcheck/director/aggregator.py
@@ -30,6 +30,7 @@ from . import logger, status, checker, interrupt
 
 _threads_lock = threading.RLock()
 _hosts_lock = threading.RLock()
+_downloadedbytes_lock = threading.RLock()
 
 def new_request_session(config):
     """Create a new request session."""
@@ -60,13 +61,13 @@ class Aggregate (object):
         requests_per_second = config["maxrequestspersecond"]
         self.wait_time_min = 1.0 / requests_per_second
         self.wait_time_max = max(self.wait_time_min + 0.5, 0.5)
+        self.downloaded_bytes = 0
 
     @synchronized(_threads_lock)
     def start_threads (self):
         """Spawn threads for URL checking and status printing."""
         if self.config["status"]:
-            t = status.Status(self.urlqueue, self.config.status_logger,
-                self.config["status_wait_seconds"])
+            t = status.Status(self, self.config["status_wait_seconds"])
             t.start()
             self.threads.append(t)
         if self.config["maxrunseconds"]:
@@ -166,3 +167,7 @@ class Aggregate (object):
         """Determine if checking is finished."""
         self.remove_stopped_threads()
         return self.urlqueue.empty() and not self.threads
+
+    @synchronized(_downloadedbytes_lock)
+    def add_downloaded_bytes(self, numbytes):
+        self.downloaded_bytes += numbytes
diff --git a/linkcheck/director/console.py b/linkcheck/director/console.py
index f4cd42e1..6b06f996 100644
--- a/linkcheck/director/console.py
+++ b/linkcheck/director/console.py
@@ -42,7 +42,8 @@ class StatusLogger (object):
         """Save file descriptor for logging."""
         self.fd = fd
 
-    def log_status (self, checked, in_progress, queue, duration):
+    def log_status (self, checked, in_progress, queue, duration,
+                    downloaded_bytes):
         """Write status message to file descriptor."""
         msg = _n("%2d thread active", "%2d threads active", in_progress) % \
           in_progress
@@ -52,6 +53,8 @@ class StatusLogger (object):
         msg = _n("%4d link checked", "%4d links checked", checked) % checked
         self.write(u"%s, " % msg)
         msg = _("runtime %s") % strformat.strduration_long(duration)
+        self.write(u"%s, " % msg)
+        msg = _("downloaded %s") % strformat.strsize(downloaded_bytes)
         self.writeln(msg)
         self.flush()
 
diff --git a/linkcheck/director/logger.py b/linkcheck/director/logger.py
index 22fe8a70..eba46bc6 100644
--- a/linkcheck/director/logger.py
+++ b/linkcheck/director/logger.py
@@ -38,12 +38,12 @@ class Logger (object):
         for logger in self.loggers:
             logger.start_output()
 
-    def end_log_output (self):
+    def end_log_output (self, downloaded_bytes):
         """
         End output of all configured loggers.
         """
         for logger in self.loggers:
-            logger.end_output()
+            logger.end_output(downloaded_bytes)
 
     def do_print (self, url_data):
         """Determine if URL entry should be logged or not."""
diff --git a/linkcheck/director/status.py b/linkcheck/director/status.py
index 1837387c..1efbf11d 100644
--- a/linkcheck/director/status.py
+++ b/linkcheck/director/status.py
@@ -22,7 +22,7 @@ from . import task
 class Status (task.LoggedCheckedTask):
     """Thread that gathers and logs the status periodically."""
 
-    def __init__ (self, urlqueue, logger, wait_seconds):
+    def __init__ (self, aggregator, wait_seconds):
         """Initialize the status logger task.
         @param urlqueue: the URL queue
         @ptype urlqueue: Urlqueue
@@ -31,8 +31,9 @@ class Status (task.LoggedCheckedTask):
         @param wait_seconds: interval in seconds to report status
         @ptype wait_seconds: int
         """
+        logger = aggregator.config.status_logger
         super(Status, self).__init__(logger)
-        self.urlqueue = urlqueue
+        self.aggregator = aggregator
         self.wait_seconds = wait_seconds
         assert self.wait_seconds >= 1
 
@@ -52,5 +53,7 @@ class Status (task.LoggedCheckedTask):
     def log_status (self):
         """Log a status message."""
         duration = time.time() - self.start_time
-        checked, in_progress, queue = self.urlqueue.status()
-        self.logger.log_status(checked, in_progress, queue, duration)
+        checked, in_progress, queue = self.aggregator.urlqueue.status()
+        downloaded_bytes = self.aggregator.downloaded_bytes
+        self.logger.log_status(checked, in_progress, queue, duration,
+                               downloaded_bytes)
diff --git a/linkcheck/gui/__init__.py b/linkcheck/gui/__init__.py
index b1a2f920..274078ed 100644
--- a/linkcheck/gui/__init__.py
+++ b/linkcheck/gui/__init__.py
@@ -84,7 +84,7 @@ class LinkCheckerMain (QtGui.QMainWindow, Ui_MainWindow):
     """The main window displaying checked URLs."""
 
     log_url_signal = QtCore.pyqtSignal(object)
-    log_status_signal = QtCore.pyqtSignal(int, int, int, float)
+    log_status_signal = QtCore.pyqtSignal(int, int, int, float, int)
     log_stats_signal = QtCore.pyqtSignal(object)
     error_signal = QtCore.pyqtSignal(str)
 
@@ -569,11 +569,13 @@ Version 2 or later.
         """Show given link in status bar."""
         self.statusBar.showMessage(link)
 
-    def log_status (self, checked, in_progress, queued, duration):
+    def log_status (self, checked, in_progress, queued, duration,
+                    downloaded_bytes):
         """Update number of checked, active and queued links."""
         self.label_checked.setText(u"%d" % checked)
         self.label_active.setText(u"%d" % in_progress)
         self.label_queued.setText(u"%d" % queued)
+        # XXX display downloaded bytes
 
     def log_stats (self, statistics):
         """Set statistic information for selected URL."""
diff --git a/linkcheck/gui/logger.py b/linkcheck/gui/logger.py
index 6bf18267..83b5a283 100644
--- a/linkcheck/gui/logger.py
+++ b/linkcheck/gui/logger.py
@@ -55,8 +55,9 @@ class SignalLogger (_Logger):
         """Emit URL data which gets logged in the main window."""
         self.log_url_signal.emit(url_data)
 
-    def end_output (self):
+    def end_output (self, downloaded_bytes=None):
         """Emit statistic data which gets logged in the main window."""
+        self.stats.downloaded_bytes = downloaded_bytes
         self.log_stats_signal.emit(self.stats)
 
 
@@ -67,6 +68,8 @@ class StatusLogger (object):
         """Store given signal object."""
         self.signal = signal
 
-    def log_status (self, checked, in_progress, queued, duration):
+    def log_status (self, checked, in_progress, queued, duration,
+                    downloaded_bytes):
         """Emit signal with given status information."""
-        self.signal.emit(checked, in_progress, queued, duration)
+        self.signal.emit(checked, in_progress, queued, duration,
+                         downloaded_bytes)
diff --git a/linkcheck/logger/__init__.py b/linkcheck/logger/__init__.py
index 15e1e34e..f086201b 100644
--- a/linkcheck/logger/__init__.py
+++ b/linkcheck/logger/__init__.py
@@ -89,6 +89,8 @@ class LogStatistics (object):
         self.min_url_length = 0
         self.avg_url_length = 0.0
         self.avg_number = 0
+        # overall downloaded bytes
+        self.downloaded_bytes = None
 
     def log_url (self, url_data, do_print):
         """Log URL statistics."""
@@ -399,7 +401,7 @@ class _Logger (object):
         pass
 
     @abc.abstractmethod
-    def end_output (self):
+    def end_output (self, downloaded_bytes=None):
         """
         End of output, used for cleanup (eg output buffer flushing).
         """
diff --git a/linkcheck/logger/blacklist.py b/linkcheck/logger/blacklist.py
index 055077ba..b1ec53d5 100644
--- a/linkcheck/logger/blacklist.py
+++ b/linkcheck/logger/blacklist.py
@@ -66,7 +66,7 @@ class BlacklistLogger (_Logger):
             if not url_data.valid:
                 self.blacklist[key] = 1
 
-    def end_output (self):
+    def end_output (self, downloaded_bytes=None):
         """
         Write blacklist file.
         """
diff --git a/linkcheck/logger/csvlog.py b/linkcheck/logger/csvlog.py
index 051d94bc..899c4576 100644
--- a/linkcheck/logger/csvlog.py
+++ b/linkcheck/logger/csvlog.py
@@ -130,7 +130,7 @@ class CSVLogger (_Logger):
         # empty queue
         self.queue.truncate(0)
 
-    def end_output (self):
+    def end_output (self, downloaded_bytes=None):
         """Write end of checking info as csv comment."""
         if self.has_part("outro"):
             self.write_outro()
diff --git a/linkcheck/logger/customxml.py b/linkcheck/logger/customxml.py
index 10602723..4319f6b2 100644
--- a/linkcheck/logger/customxml.py
+++ b/linkcheck/logger/customxml.py
@@ -95,7 +95,7 @@ class CustomXMLLogger (xmllog._XMLLogger):
         self.xml_endtag(u'urldata')
         self.flush()
 
-    def end_output (self):
+    def end_output (self, downloaded_bytes=None):
         """
         Write XML end tag.
         """
diff --git a/linkcheck/logger/graph.py b/linkcheck/logger/graph.py
index f5aed857..fe948aa7 100644
--- a/linkcheck/logger/graph.py
+++ b/linkcheck/logger/graph.py
@@ -83,7 +83,7 @@ class _GraphLogger (_Logger):
         """Write end-of-graph marker."""
         pass
 
-    def end_output (self):
+    def end_output (self, downloaded_bytes=None):
         """Write edges and end of checking info as gml comment."""
         self.write_edges()
         self.end_graph()
diff --git a/linkcheck/logger/gxml.py b/linkcheck/logger/gxml.py
index 04e7cb72..b0976654 100644
--- a/linkcheck/logger/gxml.py
+++ b/linkcheck/logger/gxml.py
@@ -81,7 +81,7 @@ class GraphXMLLogger (_XMLLogger, _GraphLogger):
         self.xml_endtag(u"data")
         self.xml_endtag(u"edge")
 
-    def end_output (self):
+    def end_output (self, downloaded_bytes=None):
         """Finish graph output, and print end of checking info as xml
         comment."""
         self.xml_endtag(u"graph")
diff --git a/linkcheck/logger/html.py b/linkcheck/logger/html.py
index 93300218..e5e32e1d 100644
--- a/linkcheck/logger/html.py
+++ b/linkcheck/logger/html.py
@@ -324,7 +324,7 @@ class HtmlLogger (_Logger):
             configuration.DonateUrl+u"</a>."))
         self.writeln(u"</small></body></html>")
 
-    def end_output (self):
+    def end_output (self, downloaded_bytes=None):
         """Write end of checking info as HTML."""
         if self.has_part("stats"):
             self.write_stats()
diff --git a/linkcheck/logger/none.py b/linkcheck/logger/none.py
index 7f3308fe..720d613d 100644
--- a/linkcheck/logger/none.py
+++ b/linkcheck/logger/none.py
@@ -43,7 +43,7 @@ class NoneLogger (_Logger):
         """Do nothing."""
         pass
 
-    def end_output (self):
+    def end_output (self, downloaded_bytes=None):
         """
         Do nothing.
         """
diff --git a/linkcheck/logger/sitemapxml.py b/linkcheck/logger/sitemapxml.py
index 5a21d36c..bd1e8776 100644
--- a/linkcheck/logger/sitemapxml.py
+++ b/linkcheck/logger/sitemapxml.py
@@ -113,7 +113,7 @@ class SitemapXmlLogger (xmllog._XMLLogger):
         self.xml_endtag(u'url')
         self.flush()
 
-    def end_output (self):
+    def end_output (self, downloaded_bytes=None):
         """Write XML end tag."""
         self.xml_endtag(u"urlset")
         self.xml_end_output()
diff --git a/linkcheck/logger/sql.py b/linkcheck/logger/sql.py
index cca8fc31..42463daf 100644
--- a/linkcheck/logger/sql.py
+++ b/linkcheck/logger/sql.py
@@ -131,7 +131,7 @@ class SQLLogger (_Logger):
               })
         self.flush()
 
-    def end_output (self):
+    def end_output (self, downloaded_bytes=None):
         """
         Write end of checking info as sql comment.
         """
diff --git a/linkcheck/logger/text.py b/linkcheck/logger/text.py
index c9a5f4a6..251113a9 100644
--- a/linkcheck/logger/text.py
+++ b/linkcheck/logger/text.py
@@ -260,6 +260,8 @@ class TextLogger (_Logger):
         """Write check statistic info."""
         self.writeln()
         self.writeln(_("Statistics:"))
+        if self.stats.downloaded_bytes is not None:
+            self.writeln(_("Downloaded: %s.") % strformat.strsize(self.stats.downloaded_bytes))
         if self.stats.number > 0:
             self.writeln(_(
               "Content types: %(image)d image, %(text)d text, %(video)d video, "
@@ -272,9 +274,10 @@ class TextLogger (_Logger):
         else:
             self.writeln(_("No statistics available since no URLs were checked."))
 
-    def end_output (self):
+    def end_output (self, downloaded_bytes=None):
         """Write end of output info, and flush all output buffers."""
         if self.has_part('stats'):
+            self.stats.downloaded_bytes = downloaded_bytes
             self.write_stats()
         if self.has_part('outro'):
             self.write_outro()