It's not that hard. Someone alrady posted what the scale actually means in Celsius. As for "keeping" a "normal" or steady amount of heat in degrees, all you need is to keep the door of the oven closed. Only open up if necessary. We Mexicans been cooking with this ovens for a lifetime and we are better than Americans or Euros at it. Now, you may want a thermostat because if your ovens plumbing (pardon the use of words if incorrect) is cogged then your output of heat will be less than what the scale says it should be.