In the metric system energy is measured in calories ... yes, calories. The heat of 1 calorie is the equivalent of the heat required to raise the temperature of 1 gram of water by 1 degree Celsius. On the Fahrenheit scale water freezes at 32 degrees and boils at 212 degrees. On the Centigrade scale water freezes at 0 degree and boils at 100 degrees. To convert from Fahrenheit to Centigrade subtract 32 and multiply by .55. To convert from Centigrade to Fahrenheit multiply by 1.8 and add 32. In case you ever need it ... now you know. ~ Chef Wilkinson ~