Double the Celsius temperature minus
(1/10 of that result) + 32
Boiling point of water = 100°C
2x100=200-20=180 + 32=
212°F
(Google
it)
What's the freezing
point of water??
0°C
0°C x 2 = 0 + 32 = 32°F
(Google
it)
Forty below is
forty below
-40°C x2= -80 - -8 (+8) = -72 +32 = -40°F
I'll let you Google that one yourself.
If you Google
Celsius Fahrenheit Conversion, just about all use the formula
C x (9/5) +
32 = F
Well, this
is a more User Friendly form of the 9/5
9/5 = 1.8
I use 2
(doubling) minus 10% or .2
2 - .2 = 1.8
Whoa! it's the same formula. Just a LOT easier to
use.