Thanks. But make ˚C -> ˚F an option! Many of us don't have the faintest idea what 100˚F is (I must multiply it with 5, divide it by 9 and subtract 32 or 23 from it... too much work)!

(as a side note: for the benefit of others, ˚ is typed with option-k. I had to try a million different combination until I found it).