Hi Schmithy. Calories have been showing as zero on the device AND on the data uploaded to Hi Schmithy. Calories have been showing as zero on the device AND on the data uploaded to Garmin Connect. HOWEVER, there has been a development. Today, I went for a ride on another bike and changed the bike profile before doing so. The bike I was using doesn't have a cadence sensor but I was wearing the heart monitor and the device calculates the speed from GPS. And what did I discover? That the device was calculating Calories Burned! And the data was still there when I upload to Connect. All I need to do now is switch back to the bike I was having a problem with and see if the Calories Burned is working. If it does, I am baffled. If it doesn't, then there must be a setting somewhere that is either specific to the Bike Profile, or the presence of the cadence sensor is confusing the device. I will keep you posted.