diff --git a/webui/controller/health/worker.php b/webui/controller/health/worker.php
index f33598d5..ee7bf2a8 100644
--- a/webui/controller/health/worker.php
+++ b/webui/controller/health/worker.php
@@ -67,7 +67,12 @@ class ControllerHealthWorker extends Controller {
 
 
       list($archivesizeraw, $this->data['counters']) = $this->model_stat_counter->get_counters();
-	  
+  
+      $oldest_record_timestamp = $this->model_health_health->get_oldest_record_ts();
+      $total_number_days = round( (time() - $oldest_record_timestamp) / 86400 );
+      
+      echo("Total Days: ".date("d M Y",time())." - ".date("d M Y",$oldest_record_timestamp)." = $total_number_days<br/>"); 
+      
       $this->data['archive_size'] = nice_size($archivesizeraw, ' ');
 
       $this->data['prefix'] = '';
@@ -76,38 +81,42 @@ class ControllerHealthWorker extends Controller {
       $this->data['sysinfo'] = $this->model_health_health->sysinfo();
 
       $this->data['options'] = $this->model_health_health->get_options();
-	  
+  
       $sqlsizeraw = $this->model_health_health->get_database_size();
-	  
+  
       $sphinxsizeraw = $this->model_health_health->get_sphinx_size();
-	  
-      /* these next counters are for projecting space */
-      $averagemessagesweekraw = ($this->data['processed_emails'][1]) / 7;
-      $averagemessagesmonthraw = ($this->data['processed_emails'][2]) / 30;
-      $averagemessagesizeraw = $archivesizeraw / $this->data['counters']['rcvd'];
-      $averagesqlsizeraw = $sqlsizeraw / $this->data['counters']['rcvd'];
-      $averagesphinxsizeraw = $sphinxsizeraw / $this->data['counters']['rcvd'];
-      $averagesizedayraw = ($averagemessagesizeraw+$averagesqlsizeraw+$averagesphinxsizeraw) * $averagemessagesweekraw;
+  
+      /* message count variables */
+      $averagemessagesweekraw = ($this->data['processed_emails'][1]) / 7;                       //average messages per day, computed over the past week
+      $averagemessagesmonthraw = ($this->data['processed_emails'][2]) / 30;                     //average messages per day, computed over the past month
+      $averagemessagestotalraw = ($this->data['counters']['rcvd']) / $total_number_days;        //average messages per day, computed over the time period since the first email was archived
+      
+      /* message size variables */
+      $averagemessagesizeraw = $archivesizeraw / $this->data['counters']['rcvd'];               //average message size, computed for total messages in database
+      $averagesqlsizeraw = $sqlsizeraw / $this->data['counters']['rcvd'];                       //average message metadata size, computed for total messages in database
+      $averagesphinxsizeraw = $sphinxsizeraw / $this->data['counters']['rcvd'];                 //average message sphinx index size, computed for total messages in database
+      $averagesizedayraw = ($averagemessagesizeraw+$averagesqlsizeraw+$averagesphinxsizeraw) * $averagemessagestotalraw; //average total message size per day, computed over the time period since the first email was archived
 
       $datapart = 0;
       foreach($this->data['shortdiskinfo'] as $part) {
-         if( $part['partition'] == DATA_PARTITION ) { $datapart = $part['freespace']*1024; }
+         if( $part['partition'] == DATA_PARTITION ) { $datapart = $part['freespace']*1024; }    // if the partition is the selected storage partition, record freespace on that partition
       }
-	  
-      $this->data['averagemessages'] = round($averagemessagesweekraw);							// average of messages over the past week
-      $this->data['averagemessagesize'] = nice_size($averagemessagesizeraw,' ');				// average message size on disk
-      $this->data['averagesqlsize'] = nice_size($averagesqlsizeraw,' ');						// average metadata size in sql
-      $this->data['averagesphinxsize'] = nice_size($averagesphinxsizeraw,' ');					// average sphinx index
-      $this->data['averagesizeday'] = nice_size($averagesizedayraw,' ');						// average size per day
-      $this->data['daysleftatcurrentrate'] = convert_days_ymd($datapart / $averagesizedayraw);	// number of days of free space left
-      if ( $averagemessagesweekraw > $averagemessagesmonthraw ) {
+
+      $this->data['oldestmessagets'] = $oldest_record_timestamp;							    // date of the oldest record in the db
+      $this->data['averagemessages'] = round($averagemessagesweekraw);							// rounded average of messages over the past week
+      $this->data['averagemessagesize'] = nice_size($averagemessagesizeraw,' ');    			// formatted average message size on disk
+      $this->data['averagesqlsize'] = nice_size($averagesqlsizeraw,' ');						// formatted average metadata size in sql
+      $this->data['averagesphinxsize'] = nice_size($averagesphinxsizeraw,' ');					// formatted average sphinx index
+      $this->data['averagesizeday'] = nice_size($averagesizedayraw,' ');						// formatted average size per day
+      $this->data['daysleftatcurrentrate'] = convert_days_ymd($datapart / $averagesizedayraw);	// estimated number of days of free space left
+      if ( $averagemessagesweekraw > $averagemessagesmonthraw ) {                               // determine if the trend of the last week compared to the last month is increasing, decreasing, or neutral (only applies to message count, not size)
          $this->data['usagetrend'] = 1;
       } elseif( $averagemessagesweekraw < $averagemessagesmonthraw ) {
          $this->data['usagetrend'] = -1;
       } else {
          $this->data['usagetrend'] = 0;
       }
-	  
+  
       $this->render();
    }
 
diff --git a/webui/model/health/health.php b/webui/model/health/health.php
index ec0e31ff..51c2d2e2 100644
--- a/webui/model/health/health.php
+++ b/webui/model/health/health.php
@@ -138,6 +138,7 @@ class ModelHealthHealth extends Model {
 
    }
 
+
    public function get_database_size() {
       $data = array();
 
@@ -147,13 +148,30 @@ class ModelHealthHealth extends Model {
 								WHERE table_schema = '".DB_DATABASE."'
 								GROUP BY table_schema;");
       if(isset($query->rows)) {
-		  $data = array_pop($query->rows);
+         $data = array_pop($query->rows);
+      } else {
+         $data['size'] = 0;
       }
 
       return $data['size'];
    }
 
 
+   public function get_oldest_record_ts() {
+      $data = array();
+
+      $query = $this->db->query("SELECT MIN(`arrived`) AS `oldest_record_ts` FROM " . TABLE_META);
+      
+      if(isset($query->rows)) {
+         $data = array_pop($query->rows);
+      } else {
+         $data['oldest_record_ts'] = 0;
+      }
+
+      return $data['oldest_record_ts'];
+   }
+
+
    public function get_sphinx_size($directory = DIR_SPHINX) {
       $dirSize=0;
 
diff --git a/webui/view/theme/default/templates/health/worker.tpl b/webui/view/theme/default/templates/health/worker.tpl
index 14e97c43..ce209c5f 100644
--- a/webui/view/theme/default/templates/health/worker.tpl
+++ b/webui/view/theme/default/templates/health/worker.tpl
@@ -68,6 +68,10 @@
 				<tr>
 					<th colspan="2">Cumulative Counts</th>
 				</tr>
+                                <tr>
+                                        <td><?php print $text_oldest_record; ?></td>
+                                        <td><?php print date("d M Y", $oldestmessagets); ?></td>
+                                </tr>                
 				<tr>
 					<td><?php print $text_processed_emails; ?></td>
 					<td><?php print $processed_emails[0]; ?> (<?php print $text_24_hours; ?>)<br /><?php print $processed_emails[1]; ?> (<?php print $text_1_week; ?>)<br /><?php print $processed_emails[2]; ?> (<?php print $text_30_days; ?>)</td>
diff --git a/webui/view/theme/orig/templates/health/worker.tpl b/webui/view/theme/orig/templates/health/worker.tpl
index ce60864b..f67aee2c 100644
--- a/webui/view/theme/orig/templates/health/worker.tpl
+++ b/webui/view/theme/orig/templates/health/worker.tpl
@@ -73,6 +73,12 @@
             <div class="cellhealthright"><span class="bold <?php if($options['enable_purge'] == 1) { ?>text-success<?php } else { ?>text-error<?php } ?>"><?php if($options['enable_purge'] == 1) { print $text_enabled; ?>. <a href="<?php print HEALTH_URL; ?>&toggle_enable_purge"><?php print $text_disable; ?></a><?php } else { print $text_disabled; ?>. <a href="<?php print HEALTH_URL; ?>&toggle_enable_purge"><?php print $text_enable; ?></a><?php } ?> </span></div>
          </div>
 
+         <div class="row">
+            <div class="cellhealthleft"><?php print $text_oldest_record; ?></div>
+            <div class="cellhealthright">
+               <?php print date("d M Y", $oldestmessagets); ?>
+            </div>
+         </div>
 
          <div class="row">
             <div class="cellhealthleft"><?php print $text_counters; ?></div>