To easily convert between F and C, simply cool the thing down to -40° and you're good you go

C to F = 100 is too hot, 0 is too cold, 50 is just righ- ah damn it

F vs c is easier if you think in bands of temps. 15 C is about 60 F. Each ten degrees difference in F is about 5 degrees different in C. So 20 C is about 70 F. 10 C is about 50 F.

For above freezing, terrestrial temperatures, Canadians have long depended on the "double it and add 30" rule to understand freedom temperature units while travelling.

For F and C, there's a 10% variation from double/divide (5/9 vs 9/5).

So add or subtract 10% after doing that part.

1 kg = 2 * lb + 1/5 * lb (lucky for us 5 is a prime factor of base 10)

basically me as I'm slowly learning metric