Did you know that there's one easy way to find a conversion formula between Celsius and other temperature scales?
First of all, if someone presents you a new scale, he probably tells you the freezing and boiling point of water. In Celsius it's 0 and 100, and in Fahrenheit 32 and 212.
I'll make an example by converting Celsius to Fahrenheit. Celsius will be the "source scale" and Fahrenheit will be the "destination scale".
The first thing you need to do is subtract the destination scale (F) freezing temp (of water) from the destination scale boiling temp. (212-32=180)
Divide the result by [source boiling point]-[source freezing point]. If you'd do Fahrenheit to Celsius, you would divide the result by 212-32=180. Since I'm converting from Celsius, I'm dividing the result by 100-0=100. 180/100=1.8, which means that each degree Celsius is 1.8 degrees Fahrenheit. Of course if you already know the distances between each degree, you can skip this step entirely.
The next step is very simple. If you're converting from Celsius, multiply the source temperature by the "distance" between each degree in the destination scale (in my case 1.8) and add the freezing point of water in the destination scale (in my case 32).
If you're converting to Celsius, subtract the freezing point of water in the destination scale from the source temperature, and divide the result by the "distance" between each degree in the destination scale.
Let's say my temperature was 40 Celsius. In Fahrenheit that would be 40*1.8+32=104.
To convert 104 Fahrenheit back to Celsius, do (104-32)/1.8=40.
Dlcs18 once made a scale called Unfriad, where water boils at 9001 and freezes at -9001. I've found that each degree Celsius is 180.02 degrees Unfriad, and made Celsius-Unfriad and Unfriad-Celsius conversion formulae, all using the method described above.
27 Celsius in Unfriad would be 25*180.02+(-9001)=25*180.02-9001=4140.46.
This isn't very understandable, but I did my best. My country isn't an English-speaking one, so I'm quite unfamiliar with English math terms.
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