diff --git a/src/Range.cpp b/src/Range.cpp
index 6ab8aebc..163e5e41 100644
--- a/src/Range.cpp
+++ b/src/Range.cpp
@@ -220,6 +220,17 @@ std::vector <Range> Range::subtract (const Range& other) const
   return results;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// Returns the number of seconds between start and end.
+// If the range is open, use 'now' as the end.
+time_t Range::total () const
+{
+  if (ended ())
+    return Datetime (end) - Datetime (start);
+
+  return Datetime () - Datetime (start);
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 std::string Range::dump () const
 {
diff --git a/src/Range.h b/src/Range.h
index 9400a508..8c3267d1 100644
--- a/src/Range.h
+++ b/src/Range.h
@@ -42,6 +42,7 @@ public:
   bool overlap (const Range&) const;
   Range intersect (const Range&) const;
   std::vector <Range> subtract (const Range&) const;
+  time_t total () const;
 
   std::string dump () const;