Saturday, December 21, 2013

Celsius to Fahrenheit


Move along people, there's nothing to see here.

Just needed a convenient table for working with some home automation temperature sensors.


Common°C°F
100 C (Boiling)
100
212
60 C (Hot Drink)
60
140
40 C (Hot Bath)
40
~ 100
Body
32
98.6
30 C (Beach)
30
85
Perfection
22.22
72
20 C (Room)
20
~ 70
10 C (Chilly)
10
50
4 C (Refrigerator)
4
~ 40
0 C (Freezing)
0
32
-10 C (Bitter Cold)
-10
~ 15
-20 C (Freezer / 0 F)
-20
~ 0
-40 C = -40 F
-40
-40

Conversion Formulas:
 °C  x  9/5 [1.8] + 32 = °F
(°F  -  32)  x  5/9 [~.56 or / 1.8] = °C


 °C  x  1.8 + 32 = °F
(°F  -  32)  / 1.8 = °C

Cheap Estimation Conversion:
 °C  x  2 + 30 = °F
(°F  -  30)  /  2 = °C

Quick table, adding 5 to the Celsius = adding 9 to the Fahrenheit
0=32, 5=41, 10=50, 15=59, 20=68, 25=77, 30=86, 35=95, 40=104

Other easy ones to remember:
28 C = ~ 82 F
16 C = ~ 61 F
04 C = ~ 40 F

From xkcd, just remember actual reference points, not conversions:
40 C = Really hot
37 C = I'm not sick
30 C = Warm
20 C = Nice
10 C = Cool
0 C = Cold

xkcd Converting to Metric - http://xkcd.com/526/

For scientists, to convert from Celsius to Kelvin (based on absolute zero):
°C + 273.15 = K
K - 273.15 = °C
Note: Kelvin temperature scale does not use the degree (°) symbol.

For temperature intervals rather than specific temperatures,
1 K = 1 °C = 95 °F

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