temperatures - is it hot or cold?!

It's rather difficult to understand the texts, programmes, films etc. that use other measurement system than our own. Therefore, I post here a conversion page that you can check when you have problems with temperatures in Fahrenheit.
And for quick reference 0 degrees Celcius = 32 degrees Fahrenheit and -19 degrees F is -28 degrees C...

But the calculating formula is too difficult for me to know by heart.
So just have fun converting different temperatures...