diff --git a/lib/oven.py b/lib/oven.py
index d0d9ebc..49f290b 100644
--- a/lib/oven.py
+++ b/lib/oven.py
@@ -327,6 +327,8 @@ class Oven(threading.Thread):
         self.totaltime = 0
         self.target = 0
         self.heat = 0
+        self.heat_rate = 0
+        self.heat_rate_temps = []
         self.pid = PID(ki=config.pid_ki, kd=config.pid_kd, kp=config.pid_kp)
 
     @staticmethod
@@ -339,6 +341,24 @@ class Oven(threading.Thread):
             startat = 0
         return startat
 
+    def set_heat_rate(self,runtime,temp):
+        '''heat rate is the heating rate in degrees/hour
+        '''
+        # arbitrary number of samples
+        # the time this covers changes based on a few things
+        numtemps = 60
+        self.heat_rate_temps.append((runtime,temp))
+         
+        # drop old temps off the list
+        if len(self.heat_rate_temps) > numtemps:
+            self.heat_rate_temps = self.heat_rate_temps[-1*numtemps:]
+        time2 = self.heat_rate_temps[-1][0]
+        time1 = self.heat_rate_temps[0][0]
+        temp2 = self.heat_rate_temps[-1][1]
+        temp1 = self.heat_rate_temps[0][1]
+        if time2 > time1:
+            self.heat_rate = ((temp2 - temp1) / (time2 - time1))*3600
+
     def run_profile(self, profile, startat=0, allow_seek=True):
         log.debug('run_profile run on thread' + threading.current_thread().name)
         runtime = startat * 60
@@ -426,6 +446,8 @@ class Oven(threading.Thread):
             temp = 0
             pass
 
+        self.set_heat_rate(self.runtime,temp)
+
         state = {
             'cost': self.cost,
             'runtime': self.runtime,
@@ -433,6 +455,7 @@ class Oven(threading.Thread):
             'target': self.target,
             'state': self.state,
             'heat': self.heat,
+            'heat_rate': self.heat_rate,
             'totaltime': self.totaltime,
             'kwh_rate': config.kwh_rate,
             'currency_type': config.currency_type,