Fahrenheit to celsius comes down to one dependable formula. Subtract 32 from the Fahrenheit number then divide what is left by 1.8. That is the method weather services and scientists use because it gives spot on results. Picture water boiling at 212 Fahrenheit. Take away 32 and you get 180 then divide by 1.8 and you sit exactly at 100 Celsius. After you walk through it a couple of times with...