How do you memorize how to covert Fareheit to Celcius, and Celsius to Fahrenheit?

I don't really talk to americans, so I never need to.

There's no formula in my head, it's just straight vibes.

First one, then th'other.

Doing the actual precise formula in your head is a waste of time, it's more useful to remember approximate round numbers for things like what's a comfortable room temperature (20C/70F), a hot day (30C/85F), freezing, boiling, etc. Fun fact: -40 is -40 in both.

I don't . I use a calculator

C > F just double and add 32 and you'll get close enough.

please don't ask me to launch any rockets or anything but it works out pretty well on the fly when my american brain is talking weather with someone who uses metric

32F is 0C, from there every 9F is 5C. Increase the digit on the left, decrease the digit on the right for every 5°C. So 41F=5C, 50F=10C, 59F=15C, etc. Then I approximate each 2 degrees F as 1 degree C, so for example if it is 13°C outside, than is close to 15°C, which is 59°C, and I subtract 4, which gives me 55°F. This is just how I do it, not sure if it helps.

Someone here suggested multiplying by 2, add 32, and someone else said multiply by 2, add 30. I don't know if this complicates it more, but what you can do is multiply by 2, add 32, and subtract 2 times the first digit, assuming that the number is 2 digits. So for example, let's say the temperature is -21°C. Multiply by 2, and you get -42, add 32, that is -10, and then subtract 2(-2), and that's -6°F.

For converting from F to C, you could adapt this method. Subtract 32, divide by 2, and add the first digit of the answer rounded to the closest tens place. So if we have 83°F, we subtract 32 to get 51, divide by 2 and that's 25.5, add 3 and that's 28.5°C.

Also sometimes some numbers are easy to convert, such as -40°, and there is also that 3.9°C=39°F, although these probably aren't that useful.

Basically brute forced it by checking fridge temperatures at jobs cause you gotta log those for health code reasons. Most of the fridge thermometers were fareheit so now for anywhere between 0 and 10c I just kinda already know it

First of all, mesuring system was created so that all people in the world would use the same measuring units so we can understand one another and this problem you are talking about would not exist. And world did that, whole world is using centimetars and metars but no americans must piss against the wind and use inches. Whole world is using celsius but no americans must piss against the wind and use farenhajt. Whole world is using litars but no americans will use galons. Whole world is using kilometars but no americans will use miles. Whole world is using grams and kilograms but americans will use pounds… So thats why this problem now exists still after so much time since unitar metryc sistem was adopted trou whole world. But luckly its only americans, the rest of the world is fine so it doesnt matter that much but still. And to answer your question i just use iphones quick search to translate it when i rearly need it. About mesmorising idk for miles i know its about 1.6 times more than km so 100mi is 160km so thats how i remember..

I don't.

I think and say everything in Metric.

I can think and say in Imperial, but its such a boring system.

Think about it like this

100 degrees C --> 212 degrees F, right?

Well, you got to remember 5/9 or 9/5 and then the number 32, then figure out how 100 degrees C turned into 212 degrees F and vice versa, using those factors

(100 * 9/5 (or 1.8) ) + 32 = 212 degrees F

32F = 0C

61F = ~16 C

82F = ~28C

then I just estimate the conversion based on those values. Not exact, but close enough for knowing if I need a jacket or not

Mostly just google it. I memorise freezing, boiling, room and body heat temps. Once you get those then you get a good frame of refrence.

I set my personal devices to celcius to immerse myself in it more.

c to f : double it and add 30

f to c: subtract 30 then halve it

not perfect but close enough for weather purposes

Usually it's C to F for me so I divide it by 5 and multiply by 9, then add 32.

Thankfully it's usually only for weather temps so I'm never dividing by very high numbers.