Borg
Science Advisor
Gold Member
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I just treat everything as a 2:1 ratio from 30F which gets me closer than most people care about.jim hardy said:you can do that in your head while driving...
but i never figured out so easy a way to go F to C .
0F -> -15C (actual -17.7C)
10F -> -10C (actual -12.2C)
20F -> -5C (actual -6.6C)
32F -> 0C (I cheat here because everyone knows this)
40F -> 5C (actual 4.4C)
50F -> 10C (actual 10C)
60F -> 15C (actual 15.5C)
70F -> 20C (actual 21.1C)
80F -> 25C (actual 26.6C)
90F -> 30C (actual 32.2C)
Of course you could add an extra degree C for every 20F after 50F to get closer.
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