diff --git a/htdocs/core/lib/date.lib.php b/htdocs/core/lib/date.lib.php
index d6d1e0c741c..0f84f46497e 100644
--- a/htdocs/core/lib/date.lib.php
+++ b/htdocs/core/lib/date.lib.php
@@ -165,6 +165,7 @@ function convertTime2Seconds($iHours=0, $iMinutes=0, $iSeconds=0)
  *    	@param      string	$format		    Output format ('all': total delay days hour:min like "2 days 12:30",
  *                                          - 'allwithouthour': total delay days without hour part like "2 days",
  *                                          - 'allhourmin': total delay with format hours:min like "60:30",
+ *                                          - 'allhourminsec': total delay with format hours:min:sec like "60:30:10",
  *                                          - 'allhour': total delay hours without min/sec like "60:30",
  *                                          - 'fullhour': total delay hour decimal like "60.5" for 60:30,
  *                                          - 'hour': only hours part "12",
@@ -185,7 +186,7 @@ function convertSecondToTime($iSecond, $format='all', $lengthOfDay=86400, $lengt
 	if (empty($lengthOfDay))  $lengthOfDay = 86400;         // 1 day = 24 hours
     if (empty($lengthOfWeek)) $lengthOfWeek = 7;            // 1 week = 7 days
 
-	if ($format == 'all' || $format == 'allwithouthour' || $format == 'allhour' || $format == 'allhourmin')
+    if ($format == 'all' || $format == 'allwithouthour' || $format == 'allhour' || $format == 'allhourmin' || $format == 'allhourminsec')
 	{
 		if ((int) $iSecond === 0) return '0';	// This is to avoid having 0 return a 12:00 AM for en_US
 
@@ -232,11 +233,15 @@ function convertSecondToTime($iSecond, $format='all', $lengthOfDay=86400, $lengt
 				$sTime.= dol_print_date($iSecond,'hourduration',true);
 			}
 		}
-		if ($format == 'allhourmin')
+		elseif ($format == 'allhourminsec')
+		{
+		    return sprintf("%02d",($sWeek*$lengthOfWeek*24 + $sDay*24 + (int) floor($iSecond/3600))).':'.sprintf("%02d",((int) floor(($iSecond % 3600)/60))).':'.sprintf("%02d",((int) ($iSecond % 60)));
+		}
+		elseif ($format == 'allhourmin')
 		{
 		    return sprintf("%02d",($sWeek*$lengthOfWeek*24 + $sDay*24 + (int) floor($iSecond/3600))).':'.sprintf("%02d",((int) floor(($iSecond % 3600)/60)));
 		}
-		if ($format == 'allhour')
+		elseif ($format == 'allhour')
 		{
 			return sprintf("%02d",($sWeek*$lengthOfWeek*24 + $sDay*24 + (int) floor($iSecond/3600)));
 		}
diff --git a/htdocs/cron/list.php b/htdocs/cron/list.php
index 960dcb93516..5017a0af24d 100644
--- a/htdocs/cron/list.php
+++ b/htdocs/cron/list.php
@@ -409,7 +409,7 @@ print_liste_field_titre("CronDtEnd",$_SERVER["PHP_SELF"],"t.dateend","",$param,'
 print_liste_field_titre("CronMaxRun",$_SERVER["PHP_SELF"],"t.maxrun","",$param,'align="right"',$sortfield,$sortorder);
 print_liste_field_titre("CronNbRun",$_SERVER["PHP_SELF"],"t.nbrun","",$param,'align="right"',$sortfield,$sortorder);
 print_liste_field_titre("CronDtLastLaunch",$_SERVER["PHP_SELF"],"t.datelastrun","",$param,'align="center"',$sortfield,$sortorder);
-print_liste_field_titre("CronDtLastResult",$_SERVER["PHP_SELF"],"t.datelastresult","",$param,'align="center"',$sortfield,$sortorder);
+print_liste_field_titre("Duration",$_SERVER["PHP_SELF"],"","",$param,'align="center"',$sortfield,$sortorder);
 print_liste_field_titre("CronLastResult",$_SERVER["PHP_SELF"],"t.lastresult","",$param,'align="center"',$sortfield,$sortorder);
 print_liste_field_titre("CronLastOutput",$_SERVER["PHP_SELF"],"t.lastoutput","",$param,'',$sortfield,$sortorder);
 print_liste_field_titre("CronDtNextLaunch",$_SERVER["PHP_SELF"],"t.datenextrun","",$param,'align="center"',$sortfield,$sortorder);
@@ -438,6 +438,9 @@ if ($num > 0)
 		$object->priority = $obj->priority;
 		$object->processing = $obj->processing;
 
+		$datelastrun = $db->jdate($obj->datelastrun);
+		$datelastresult = $db->jdate($obj->datelastresult);
+
 		print '<tr class="oddeven">';
 
 		// Ref
@@ -510,12 +513,15 @@ if ($num > 0)
 
 		// Date start last run
 		print '<td class="center">';
-		if (!empty($obj->datelastrun)) {print dol_print_date($db->jdate($obj->datelastrun),'dayhoursec');}
+		if (!empty($datelastrun)) {print dol_print_date($datelastrun,'dayhoursec');}
 		print '</td>';
 
-		// Date end last run
+		// Duration
 		print '<td class="center">';
-		if (!empty($obj->datelastresult)) {print dol_print_date($db->jdate($obj->datelastresult),'dayhoursec');}
+		if (!empty($datelastresult) && ($datelastresult >= $datelastrun)) {
+		    print convertSecondToTime(max($datelastresult - $datelastrun, 1), 'allhourminsec');
+		    //print '<br>'.($datelastresult - $datelastrun).' '.$langs->trans("seconds");
+		}
 		print '</td>';
 
 		// Return code of last run