diff --git a/src/calibre/gui2/dialogs/edit_authors_dialog.py b/src/calibre/gui2/dialogs/edit_authors_dialog.py
index aab8a46c25..7fe50181a3 100644
--- a/src/calibre/gui2/dialogs/edit_authors_dialog.py
+++ b/src/calibre/gui2/dialogs/edit_authors_dialog.py
@@ -48,8 +48,10 @@ class EditAuthorsDialog(QDialog, Ui_EditAuthorsDialog):
                 select_item = sort
         self.table.resizeColumnsToContents()
 
-        # set up the signal after the table is filled
+        # set up the cellChanged signal only after the table is filled
         self.table.cellChanged.connect(self.cell_changed)
+
+        # set up sort buttons
         self.sort_by_author.setCheckable(True)
         self.sort_by_author.setChecked(False)
         self.sort_by_author.clicked.connect(self.do_sort_by_author)
@@ -61,6 +63,9 @@ class EditAuthorsDialog(QDialog, Ui_EditAuthorsDialog):
         self.sort_by_author_sort.setChecked(True)
         self.author_sort_order = 1
 
+        # set up author sort calc button
+        self.recalc_author_sort.clicked.connect(self.do_recalc_author_sort)
+
         if select_item is not None:
             self.table.setCurrentItem(select_item)
             self.table.editItem(select_item)
@@ -89,6 +94,17 @@ class EditAuthorsDialog(QDialog, Ui_EditAuthorsDialog):
             if orig_aut != aut or orig_sort != sort:
                 self.result.append((id, orig_aut, aut, sort))
 
+    def do_recalc_author_sort(self):
+        self.table.cellChanged.disconnect()
+        for row in range(0,self.table.rowCount()):
+            item = self.table.item(row, 0)
+            aut  = unicode(item.text()).strip()
+            c = self.table.item(row, 1)
+            # Sometimes trailing commas are left by changing between copy algs
+            c.setText(author_to_author_sort(aut).rstrip(','))
+        self.table.setFocus(Qt.OtherFocusReason)
+        self.table.cellChanged.connect(self.cell_changed)
+
     def cell_changed(self, row, col):
         if col == 0:
             item = self.table.item(row, 0)
diff --git a/src/calibre/gui2/dialogs/edit_authors_dialog.ui b/src/calibre/gui2/dialogs/edit_authors_dialog.ui
index 2352508540..6518e6a1b0 100644
--- a/src/calibre/gui2/dialogs/edit_authors_dialog.ui
+++ b/src/calibre/gui2/dialogs/edit_authors_dialog.ui
@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>730</width>
+    <width>768</width>
     <height>342</height>
    </rect>
   </property>
@@ -49,6 +49,16 @@
        </property>
       </widget>
      </item>
+     <item>
+      <widget class="QPushButton" name="recalc_author_sort">
+       <property name="toolTip">
+        <string>Reset all the author sort values to a value automatically generated from the author. Exactly how this value is automatically generated can be controlled via Preferences-&gt;Advanced-&gt;Tweaks</string>
+       </property>
+       <property name="text">
+        <string>Recalculate all author sort values</string>
+       </property>
+      </widget>
+     </item>
      <item>
       <spacer name="horizontalSpacer_3">
        <property name="orientation">