diff --git a/pi_temp.py b/pi_temp.py
index 74e570e..e894f57 100755
--- a/pi_temp.py
+++ b/pi_temp.py
@@ -123,7 +123,9 @@ def history():
     
     ## Duration of significant heat increases
     # Timestep from raw database values for temperature
-    timestep_minutes = (datetime.datetime.strptime(temperatures[1][0], "%Y-%m-%d %H:%M:%S")-datetime.datetime.strptime(temperatures[0][0], "%Y-%m-%d %H:%M:%S")).seconds/60
+    timestep_minutes = int(round((datetime.datetime.strptime(temperatures[1][0], "%Y-%m-%d %H:%M:%S")-datetime.datetime.strptime(temperatures[0][0], "%Y-%m-%d %H:%M:%S")).seconds/60))
+    if (timestep_minutes == 0):
+        timestep_minutes = 1
     # Calculate minutes for each streak
     streak_minutes = streak_lengths(time_series_temperature_values)*timestep_minutes
     
diff --git a/templates/history.html b/templates/history.html
index f6a6a30..7626f76 100755
--- a/templates/history.html
+++ b/templates/history.html
@@ -78,7 +78,7 @@
       </div>
     </div>
     
-    Furnace averaging {{ "%.2f" % (total_minutes/range_hours) }} minutes/hr ({{ total_minutes }} minutes total).
+    Furnace averaging {{ "%.0f" % (total_minutes/range_hours) }} minutes/hr ({{ total_minutes }} minutes total).
 
     <div class='row' id='plotly-plot'></div>