I find the easiest way to convert between F and C is -For clarity:
View attachment 160339
Add 40
Multiply by 5/9 or 9/5 depending which way you're going. Easy to remember as the figures in F are > those in C.
Subtract 40.
That avoids the problem of whether to add (or subtract) 32 before or after multiplying, which I find hard to remember.
Then there quite a few common cases
-40F = -40C
32F = 0C
60F ~ 15C
70F ~ 20C
212F = 100C
And if it's just a temperature difference, C = K = F*5/9
But to come to your problem - if the faucet is turned fully on, is the flow normal? If the flow is low it might mean the pipe is partially frozen.
