diff --git a/ajaxui/ajaxui_config_dvb.c b/ajaxui/ajaxui_config_dvb.c
index f1a0283d..79180db1 100644
--- a/ajaxui/ajaxui_config_dvb.c
+++ b/ajaxui/ajaxui_config_dvb.c
@@ -698,7 +698,8 @@ ajax_adaptermuxlist(http_connection_t *hc, http_reply_t *hr,
 		      tdmi->tdmi_identifier, buf);
 
       ajax_table_cell(&ta, "status", "%s", dvb_mux_status(tdmi, 0));
-      ajax_table_cell(&ta, "qual", "%d", tdmi->tdmi_quality);
+      ajax_table_cell(&ta, "qual", "%d%%",
+		      dvb_quality_to_percent(tdmi->tdmi_quality));
       ajax_table_cell(&ta, "state", "%s", dvb_mux_state(tdmi));
       ajax_table_cell(&ta, "name", "%s", tdmi->tdmi_network ?: "Unknown");
 
diff --git a/ajaxui/ajaxui_mailbox.c b/ajaxui/ajaxui_mailbox.c
index 067a9dc4..c9a056f8 100644
--- a/ajaxui/ajaxui_mailbox.c
+++ b/ajaxui/ajaxui_mailbox.c
@@ -396,7 +396,8 @@ void
 ajax_mailbox_tdmi_qual_change(th_dvb_mux_instance_t *tdmi)
 {
   char buf[10];
-  snprintf(buf, sizeof(buf), "%d", tdmi->tdmi_quality);
+  snprintf(buf, sizeof(buf), "%d%%",
+	   dvb_quality_to_percent(tdmi->tdmi_quality));
   ajax_mailbox_update_div(tdmi->tdmi_adapter->tda_identifier,
 			  "qual", tdmi->tdmi_identifier,
 			  buf);
diff --git a/dvb_support.c b/dvb_support.c
index 565a6b6f..8cbc1004 100644
--- a/dvb_support.c
+++ b/dvb_support.c
@@ -322,3 +322,13 @@ dvb_mux_state(th_dvb_mux_instance_t *tdmi)
   }
   return txt;
 }
+
+/**
+ *
+ */
+int
+dvb_quality_to_percent(int qual)
+{
+  return (qual + 50) * 2;
+}
+
diff --git a/dvb_support.h b/dvb_support.h
index 6eb27161..31b87249 100644
--- a/dvb_support.h
+++ b/dvb_support.h
@@ -62,5 +62,5 @@ th_dvb_mux_instance_t *dvb_mux_find_by_identifier(const char *identifier);
 const char *dvb_mux_status(th_dvb_mux_instance_t *tdmi, int nullisok);
 void dvb_mux_nicename(char *buf, size_t size, th_dvb_mux_instance_t *tdmi);
 const char *dvb_mux_state(th_dvb_mux_instance_t *tdmi);
-
+int dvb_quality_to_percent(int qual);
 #endif /* DVB_SUPPORT_H */