Centigrade vs Fahrenheit cheat sheet: Difference between revisions
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! How does it feel? | ! How does it feel? | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right" style="background:#C800FF"| 0° | ||
| | |align="center"| 32° | ||
| rowspan="2"| | | rowspan="2"| | ||
cold | cold | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right" style="background:#C800FF"| 5° | ||
| | |align="center"| 41° | ||
<!-- merged --> | <!-- merged --> | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right" style="background:#069EEE"| 10° | ||
| | |align="center"| 50° | ||
| rowspan="2"| | | rowspan="2"| | ||
chilly | chilly | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right" style="background:#069EEE"| 15° | ||
| | |align="center"| 59° | ||
<!-- merged --> | <!-- merged --> | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right" style="background:#B6DAEC"| 20° | ||
| | |align="center"| 68° | ||
| cool | | cool | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right" style="background:#FFEE00"| 25° | ||
| | |align="center"| 77° | ||
| warm | | warm | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right" style="background:#FFDD00"| 30° | ||
| | |align="center"| 86° | ||
| hot | | hot | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right" style="background:#FF6F00"| 35° | ||
| | |align="center"| 95° | ||
| tropical | | tropical | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right" style="background:#FF0000"| 40° | ||
| | |align="center"| 104° | ||
| melting point | | melting point | ||
|} | |} | ||
== ( | == (2C° - 0.1(2C°)) + 32 == | ||
Double C and add 32 becomes less accurate as the temperatures rise. It is exactly right at 0 C, off by 8 at 40 C, and off by 20 at 100 C. | Double C and add 32 becomes less accurate as the temperatures rise. It is exactly right at 0 C, off by 8 at 40 C, and off by 20 at 100 C. | ||
| Line 61: | Line 61: | ||
! 2*C + 32 | ! 2*C + 32 | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right"| 0° | ||
|align="right"| | |align="right"| 32° | ||
|align="left"| | |align="left"| 32° | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right"| 5° | ||
|align="right"| | |align="right"| 41° | ||
|align="left"| | |align="left"| 42° | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right"| 10° | ||
|align="right"| | |align="right"| 50° | ||
|align="left"| | |align="left"| 52° | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right"| 15° | ||
|align="right"| | |align="right"| 59° | ||
|align="left"| | |align="left"| 62° | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right"| 20° | ||
|align="right"| | |align="right"| 68° | ||
|align="left"| | |align="left"| 72° | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right"| 25° | ||
|align="right"| | |align="right"| 77° | ||
|align="left"| | |align="left"| 82° | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right"| 30° | ||
|align="right"| | |align="right"| 86° | ||
|align="left"| | |align="left"| 92° | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right"| 35° | ||
|align="right"| | |align="right"| 95° | ||
|align="left"| | |align="left"| 102° | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right"| 40° | ||
|align="right"| | |align="right"| 104° | ||
|align="left"| | |align="left"| 112° | ||
|} | |} | ||
| Line 105: | Line 105: | ||
! feels | ! feels | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right"|0°..9° | ||
|cold | |cold | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right"|10°..19° | ||
|chilly | |chilly | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right"|20°..24° | ||
|cool | |cool | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right"|25°..29° | ||
|warm | |warm | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right"|30°..34° | ||
|hot | |hot | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right"|35°..39° | ||
|tropical | |tropical | ||
|- valign="top" | |- valign="top" | ||
|align="right"| | |align="right"|40°+ | ||
|unendurable | |unendurable | ||
|} | |} | ||
[[File:Fahrenheit vs celsius.jpg]] | |||
Latest revision as of 12:22, 10 December 2022
Celsius = 5/9 (F - 32)
Fahrenheit = (9/5 C) + 32
| C | F | How does it feel? |
|---|---|---|
| 0° | 32° |
cold |
| 5° | 41° | |
| 10° | 50° |
chilly |
| 15° | 59° | |
| 20° | 68° | cool |
| 25° | 77° | warm |
| 30° | 86° | hot |
| 35° | 95° | tropical |
| 40° | 104° | melting point |
(2C° - 0.1(2C°)) + 32
Double C and add 32 becomes less accurate as the temperatures rise. It is exactly right at 0 C, off by 8 at 40 C, and off by 20 at 100 C.
- The doubling is off by 10%. 2 is 10/5, but the correct formula is 9/5, so the right factor is nine/tenths below the fudge factor.
- Double C, subtract roughly 10% of that product from itself, then add 32 improves the result.
| C | F | 2*C + 32 |
|---|---|---|
| 0° | 32° | 32° |
| 5° | 41° | 42° |
| 10° | 50° | 52° |
| 15° | 59° | 62° |
| 20° | 68° | 72° |
| 25° | 77° | 82° |
| 30° | 86° | 92° |
| 35° | 95° | 102° |
| 40° | 104° | 112° |
Feelings, whoa-oh-oh-oho, feelings
| C | feels |
|---|---|
| 0°..9° | cold |
| 10°..19° | chilly |
| 20°..24° | cool |
| 25°..29° | warm |
| 30°..34° | hot |
| 35°..39° | tropical |
| 40°+ | unendurable |
