Here are the official formulas. Degrees C x 9/5 + 32 = Degrees F. ( Degrees F - 32) x 5/9 = Degrees C. From now on I will quote outside temperatures in both degrees F and degrees C since we have a combined Canadian and American audience. After all, we are all friends separated by an international border. I have good news for the Canadians, you have all of the diamonds! The U. S. does not have the right kind of geology.