Showing posts with label homeautomation. Show all posts
Showing posts with label homeautomation. Show all posts

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