diff --git a/save-html.c b/save-html.c
index 652ffb411..6190c36c1 100644
--- a/save-html.c
+++ b/save-html.c
@@ -209,6 +209,8 @@ void write_one_dive(struct membuffer *b, struct dive *dive, const char *photos_d
 	write_attribute(b, "location", dive->location);
 	put_format(b, "\"rating\":%d,", dive->rating);
 	put_format(b, "\"visibility\":%d,", dive->visibility);
+	put_format(b, "\"dive_duration\":\"%u:%02u min\",",
+		   FRACTION(dive->duration.seconds, 60));
 	put_string(b, "\"temperature\":{");
 	put_HTML_airtemp(b, dive, "\"air\":\"", "\",");
 	put_HTML_watertemp(b, dive, "\"water\":\"", "\",");
diff --git a/theme/list_lib.js b/theme/list_lib.js
index ade54c885..2c915ad6f 100644
--- a/theme/list_lib.js
+++ b/theme/list_lib.js
@@ -212,7 +212,8 @@ function getExpanded(dive)
 		  '</td></tr></table>' +
 		  '<table><tr><td class="words">Air temp: </td><td>' + dive.temperature.air +
 		  '</td><td class="words">&nbsp;&nbsp;&nbsp;&nbsp;Water temp: </td><td>' + dive.temperature.water +
-		  '</td></tr></table><table><tr><td class="words">DiveMaster: </td><td>' + dive.divemaster +
+		  '</td></tr></table><table><tr><td class="words">Duration: </td><td>' + dive.dive_duration +
+		  '</td></tr><tr><td class="words">DiveMaster: </td><td>' + dive.divemaster +
 		  '</td></tr><tr><td class="words"><p>Buddy: </p></td><td>' + dive.buddy +
 		  '</td></tr><tr><td class="words">Suit: </td><td>' + dive.suit +
 		  '</td></tr><tr><td class="words">Tags: </td><td>' + putTags(dive.tags) +
@@ -890,7 +891,8 @@ function get_dive_HTML(dive)
 	       '</td></tr></table>' +
 	       '<table><tr><td class="words">Air temp: </td><td>' + dive.temperature.air +
 	       '</td><td class="words">&nbsp;&nbsp;&nbsp;&nbsp;Water temp: </td><td>' + dive.temperature.water +
-	       '</td></tr></table><table><tr><td class="words">DiveMaster: </td><td>' + dive.divemaster +
+	       '</td></tr></table><table><tr><td class="words">Duration: </td><td>' + dive.dive_duration +
+	       '</td></tr><tr><td class="words">DiveMaster: </td><td>' + dive.divemaster +
 	       '</td></tr><tr><td class="words"><p>Buddy: </p></td><td>' + dive.buddy +
 	       '</td></tr><tr><td class="words">Suit: </td><td>' + dive.suit +
 	       '</td></tr><tr><td class="words">Tags: </td><td>' + putTags(dive.tags) +