Easy Celsius to Fahrenheit Trick
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- Опубліковано 28 вер 2024
- Here's an easy trick to estimate Celsius to Fahrenheit (or Fahrenheit to Celsius) conversions in your head, without using a calculator or memorizing formulas.
Here are some practice questions: www.registered...
![Convert Celsius & Fahrenheit Temperature Scales in Chemistry & Physics - [1-1-4]](http://i.ytimg.com/vi/7IALrswAnxs/mqdefault.jpg)
Great video! Excelent for like the weather forecasts and such.
C -> F : Double and add 30
F -> C : Subtract 30 and half the result.
Not exactly, -40 C = -40 F
No it is not!!
According to this formula -50°C should be -70F?
It is actually -58°F
F° does not have any logic in it, what a lovely system to use
@@Vbluevital He said in the video his formula is an estimate. Exactly, it's 1.8C + 32= F , so -40 C = -40 F, the only temperature where they match!
@@irynaYe This estimating method doesn't work as well for negative numbers as it does for higher positive numbers. As far as logic, Celsius is also an just arbitrary scale superimposed on the freezing and boiling points of water. People just get used to the numbers on the scale they are accustomed to for weather temperatures, etc. so logic doesn't really matter.
@@irynaYe "lovely". Fº doesn't make any sense at all.
Here is something I worked out years ago that helps me do the math in my head. I double the Celsius, subtract 10%, then add 32. So, in the first example; 20 doubled is 40. 40 minus 10% is 36. 36 + 32 = 68.
woow thanks pal really useful 👍
@@ocralez3637 I struggled trying to multiply by 1.8 and adding 32 in my head. One day it dawned on me that doubling and subtracting 10% was the same as multiplying by 1.8. Once I realized that, I could convert in my head in seconds. In my supply chain career, I became faster than the engineers and their calculators!! And that was really COOL!😄
Best way I've found; thank you!!
Bro, your way is brilliant because it's NOT an estimate, it's an EXACT answer !!!! 🙀😸👌
Well done!! Thx
Almost the entire world uses Celsius. But we Americans have to stick to our Fahrenheit. It's a little insane. But my interest is personal. Two of my adult children are living in European countries and I want to be able to easily convert temperatures when we're chatting about the weather. This was so so helpful, Thank you very much!
yeah uh huh... Try cooking in Celcius,. Buy a chicken by the kilogram and set your oven to 176c. You can't because chickens are sold in the USA by the lb, and ovens are in F. The math to convert shows that F is 5/9 of C, meaning that F has more precision, great for cooking. Still want to swap to metric? There are ~280 million cars on the road in the USA. Suppose you change all the signs to Kilometers. Do we expect that every driver of a car older than the metric adoption needs to calculate how fast they are going because their speedometer is still in miles? It would take a monumental effort on every American's part to shift to metric and cost billions of dollars. Other than being like the rest of the world what do we gain from it? I'm not against Celsius for scientific purposes (or anything metric for that matter), but Fahrenheit is just easier for every day use.
I've used F all my life and I'm not going change now.....
@@michaelporter2574 nobody i expecting you guys to change, trust me.. 😅
@@diviosdi8065are you high? You can convert Kilo’s to Lbs easily with this channel. Also most major car manufacturers put KP/H on the speedometer until recently. And if you have a digital speedometer you can change it to KP/H, cuz its built in. We’re not the only ones in the world who drive on the wrong side of the road.
Its a conversion of maths ideals, not some tech that has to be converted ya div. Cars are made for the world economy and arent even made in America, only assembled so they can keep telling the lie about the American jobs they exported.
@@diviosdi8065you are never ever gonna use that much precision in cooking. Don't delude yourself. Adoption is always gradual.
I’m taking a certification test where I’ll have to do this with multiple choice. THANK YOU!!! This is going to make it EASY! I’m terrible memorizing formulas
Where has this been my whole life!? Thank yOu!
😢
I took the practice quiz to the link you provided, and I scored 100%. I honestly couldn't remember the conversion method if I didn't look it up to work out my problems. This method is easier to remember. Thank you so much.
You are amazing math teacher. I wish I had math teachers like you back in high school. Thank you so much for sharing your knowledge with us.
It takes almost 10 minutes to tell us how to figure it out in 5 sec - 10 sec in our heads...😂😂😂 (Actually did a great job!!)
The most accurate and yet still simplest means to the answer is
F° =2C° -(10% of the preceding multiplication)+32°
F° = 40 -4+32
F° = 68°
40°C =2(40) - 8 +32 = 104°F
You can do it all in your head. I know I can.
really awesome way to teach this trick, i could've benefit from my teachers in past if they could simplify the way you do. for real, props to ya!! 😭😅
Just what I needed! I've been getting in some tourist Spanish, Italian, and Portuguese, but forgot to account for C vs F. Thanks!
The way i convert c to f or vise versa is by knowing that 10°c is 50°F, and if you go up 10°c you go up 18°F or down 10°c you go down 18°F.
And if you want to make it even easier like he does, make the 18 a 20
Nicely put. I feel like I watched way more than I needed to , just so I could explain it as well to someone else. But I liked how you go to hole numbers to break it down. Nice Video ,I could easily watch more.
OMG!! this is SO amazing! Thank you so much! I've struggled with this for many years when we travel! I'll share how I estimate kilometers to miles: if not round number, round up, divide in half and "add a little!" gets you pretty close! (e.g., 95 km rounds to 96 mi ÷2 = 48 plus add around 10 = 58 (actual answer is 59) - the greater the number of km, the more you have to add - however, I do NOT recommend this for figuring how fast you can drive! but not bad for figuring approximate distances!
That is a cool way of doing this. I am from the US and I chat with my friend in Canada frequently. She will tell me it is 20c and I will have to google to see what it is. Now I don't have to. Thanks!
Thank you so much for your videos, they’ve been a tremendous help to me going through my ST program.
I got this super quick, im shocked i dont get math EVER!the letters acted somewhat as a guide or.. at any rate it worked! I'm 46 & FINALLY I won't be completely lost when hearing a reference to a temp in Celsius, Thank You so much! You must be a genius, it takes real intelligence to simplify these things in a way people like myself can grasp so quickly, Thank You!
Hey thanks. That's great. Simple and easy. My wife ask me all the time how hot or cold it is and if it's gonna rain. Now I'll start doing this swap on her. With the rain, I already tell her it's a 50 percent chance. It either will or it won't.
Very cool way to convert AND work the brain a little ;)
Yes. I love tricks like this. It helped get me through nursing school and has stuck with me, but I never knew one for this. Thank you.
Thank you so much for this, sir. I struggle mightily with simple math, and have to google every time I set my A/C or want to know the temp outside.
I truly appreciate you taking the time to make this… from a 48 year old woman :)
Very nice and easy explaining. I always forget but I hope this will make me remember. I have tried various approaches to remember but by far this is the best approach. I hope you can make another advanced video to give an idea about when to add a couple of degrees or subtract to provide an even closer conversion.
Thank you sooo much for your informative video 🙏🏻
I almost gave up on how to do C to F or vice versa. I found it hard to memorise the formula until I watched this video 🙃 God bless you for making one hurdle less in my brain 🙏🏻
Thanks for the great helpful advice love it .Hi from South Australia Adelaide 🇦🇺
This is great thank you. I wanted to add a little for those who might care. Without your help I would never have figured this out! I have to take my shoes off to count over 10. Grin.
Although your formula is a great idea, the answer gap starts to widen when trying to convert unusually high celsius temps like oven temperatures!
What if the quiz said 170° C equals???
The differential between the original formula and your suggested formula is quite large… You would be 370°, which is quite a gap between the original formula which comes out to 338°.
Since 9/5 is 1.8; it is 10% higher than 2, and it's so much easier to use your suggested 2, how about taking your given Celsius of 20 and reducing it by 10% before anything else just leaving the 32 as is?
Ex 20-10% = 18
2(18) + 32 = 68
And using the oven temp…
170° -17° equals 153° degrees.
153° times two equals 306°. Adding 32° to that equals 338° which is exactly what the original formula would have done.
Adding the extra math in is difficult I know but it may help when a quiz has two answers that are way too close together.
Omg. This is freaking amazing. Thanks so very much 🙏🙏🙏
Very well explained. Thank you
Thank you, this was very helpful 👍
Thank you sooo much for this clarity!!
Wowwwwww thank you sooooo very much
I can’t believe it this is so much earlier to remember. God bless you
Good video, and how about examples of winter freezing temperatures like minus 5° C because that requires being mindful of dealing with both negative and positive numbers in the same formula. So, going from - 5° C, to °F, using video's easy "A B C D E F" formula, approximates ( - 5 x 2 ) = - 10, and ( - 10 + 30 ) = + 20 ° F. So in winter, a minus C temp can equal a plus F temp. And, of course the other way around also holds. So, converting from + 20 ° F to C, gives - 5 ° C. I.e., (+20° F - 30) = -10. And (-10 ÷ 2 ) = - 5 ° C. 😊
OMG !! This is exactly what I needed. Thank you so much.
If 0° C = 32° F (freezing point) and 100° C = 212° F (boiling point) why, using your simplified shortcut, does 100° C = 230° F? Am I doing something wrong or is being off 18° F close enough?
Huh ? I feel as dumb as I did 45 years ago in math class, that went right by me.
Ok. This maybe works for small numbers, under 100.
But for oven temperature for example
180ºC x2+30 = 390ºF.
But Google converter gives 356ºF. And it is a big difference.
The earlier poster who subtracts 10% from the original answer before adding the 30 works really really well👏👏👏
Extremely helpful! Thank you so much for sharing this!
I use this to go C to F. (C x 2 x 0.9) + 32 = F Example: 20 x 2 = 40, 40 x 0.9 = 36, 36+32=68
This a good for approximating under 100°c then it requires adjustment to stay close
Thank you , this is brilliant ! Never stop learning and all the best :)
Love the CDEF mnemonic!! Thanks!
Wow, this was a great video and clever trick! I subscribed!!
You teach math like I teach my boys math, very helpful! Ty!
Awesome explanation, makes it really simple. Thanks for sharing
Thanks
Any suggestions for K to C and vice-versa? Thanks
I was told double the celcius and add 20 for a decent guesstimate. No? Is that wrong?
Thank you very much I fully appreciate it.
Great tips! Thank you so much!
This was really helpful. Thank you!
Amazing!! Thank you
Thank you !!!
Or you can just remember the actual formula, or work it out from knowing how temperature scales work.
All I wanted is a ballpark figure, when the rest of the world talks temperature! Now let’s see if can do it in practical application.
I don’t have a math brain but this is easy !
thank you soooo much.... very very very helpful!!!!!!!
Lot easier than what I was trying to be learnt is school
Thanks for sharing!
The real way to do it accurately is
cx 1.8 +32 😊
You somehow made it harder than ever
If you want to get it RIGHT you can do it in your head. Add 40; multiply by (5 / 9) if going °F to °C, or (9 / 5) if going °C to °F; and finally subtract 40.
Now you know the EASY way to do it in your head and get the correct answer. And this is far easier to commit to memory. Use this and you'll never go back to that old silly formula again.
And you may be one up on the other UA-camrs.
That's a cool method, too. Thanks for sharing.
Thank you!! 😊
Thank you man 🙏
thank you sir
Your'e a smart guy!
🥳🥳🥳 Thank you!
Thankyou sir
This is how we were taught years ago.
waoww this is so good thanks
You are wrong! 37,78C are 100 Fahrenheit
Close is only good enough when playing horseshoes or hand grenades.
shit i just wanted to check the weather and ya got me doing all this :,0
I rarely comment on videos, but this one really deserves it. Thank you so much. 😄
Thank you!!!
I wish YOU had been MY teacher back in the day! Thank you for making this conversion so easy to remember and accomplish! Great job!
Thank you for breaking down the math in simple terms. You have a gift of teaching. I wish you were my math teacher growing up. Great job.
That's what I just said to myself. Math and I don't get along 😅
Ok this is actually super helpful. As a new US expat in France I struggle all the time with the Celsius temperature. Thanks for this much easier to remember formula!
VERY helpful! You are great at systematically teaching in a simplified manner. Awesome job! And as far as converting temperatures goes, estimating is pretty much all that is needed (save medical temps).
I do something similar, but more accurate. I think of 1.8 as 2 - 0.2. So after I double I subtract 10% of the result, since 0.2 is 10% of 2. So 20 x 2 = 40. 40 - 4 = 36. 36 + 32 = 68.
I do this also. It works great. How do you do it from F to C?
I go 20x9÷5+32=68
Thank you so much for explaining this video in a way that's simple to understand. I have had dyslexia or word processing disorder for as long as I can remember and now that I still have it in my adult years (and going into the medical field) and trying to understand myself and how my brain works has been a challenge for me but since taking what I have seriously and working around it by learning the way I receive information has helped me out tremendously! The way you broke this formula down, step by step, dissecting the context was amazing to me. It felt like I had a breakthrough and the feeling of "understanding" that I got from this video, gave me hope that I can convert in my head, without the use of a device or someone else helping me. I struggle on a daily and try not to let it show to others and this content made me feel like it was designed just for me. So, thank you for making these videos! I will continue watching your content and learning from your easy-to-understand video. Thanks again!
So for celcius you can get ur final number and then subtract. So if 50 celcius comes out to 130 and its actually 122. Count your tens after 50. So 60 is 1 and 70 is 2 and 80 is 3 and all the way to 130 then subtract the 8 form 130 and you get 122.
In otherwords, 2c+30-(2c+30-c)/10
Simplifying to.. 19/10*c+27 which is NOT the same as 9/5*c+32.
In fact these equations intersect at c=50 so your "trick" ONLY works if you're trying to convert 50⁰ Celsius to Fahrenheit. It doesn't work for any other number.
This is so helpful & taught in a way both my children & I can understand. Thank you so much!
Genius! Understood by the end of the video. Perfectly explained.
Thank you so much, I've been trying to memorize the formula for ages:)))
Very helpful . . . and nicely done! Thank you for posting.
Mannnnn, you made my life easy.. love this trick 😍
This F to C, C to F conversion has bothered me for decades and today it has became a fun thing to do in head now!
4 years in highschool and I NEVER understood this formula, less than 10 minutes watching this video and I understand it 100%.
So 2 times Celsius plus 30 We'll get you within a couple degrees of the actual temperature very useful thank you
Thank you for this, I need this method to dumb it down for me.
That is brilliant. Thank you.
Thank you!!
WOW!!!
Very useful, nice video
Thank you! I've got a cousin in the States and we're always converting our temps. Might need to do some brain work so it sticks but before you're lesson I know 20C is about 70F.
You're a genius!! Thanks so much. You made it super easy, even for someone, like me, who is math challenged!! 😅😊
F=2C + 30 - you don't need ten minutes to say that I'm afraid....
Just multiply the Celsius by 1.8 and add 32. This gives you the exact temperature. Everyone has a calculator on their cell phones.
19x1.8+32= 66.2
You're INCREDIBLE for this. Thank you thank you. Studying for the MCAT here.
Omg this is amazing I paused the video and did the math and played it and got the answers right!!!! 🎉thanks so much
Obviously being 60 now, we didn’t start learning the metric system in Kindergarten so as a young teen, I already had a bit of problems in math. I was Great when it came to the basics, adding, subtraction, division and multiplication.. Until we started with fractions.. everything over and beyond was terrifying to me, no matter who tried helping me…. So we had one teacher (not a math teacher) told us that one way to convert from Celsius to Fahrenheit was quite simple, however not exact, it would work some what like this Gentleman was learning us, with a multiple choice answers not exact.. but it’s pert near the same. He said to double the number and add 3O.. so 3O*C-❓F would be 30x2+30=90 the exact answer is 86 which to me.. much MUCH simpler than this Gentleman’s way of doing it. I actually had trouble and had to watch the process a few *cough cough* times (4😳)
I lived near Canada, and listened to Canadian radio stations, which I would get a estimate conversion by multiplying Celsius ✖️ 2, and add 32. My baseline 0° 6:44 × 2= 0 + 32 = 32° F. Yes, it is close estimate, but exact about freezing. 37°C is 98.6, I would then get a closer estimate comparing my answer to this.
As you get up into higher numbers (e.g., oven temperatures), this trick doesn't work as well.
Using the trick in the video, 180C converts to 390F. But using 9/5C+32 yields 356. So it's off by 34 degrees. I don't know where things start going askew in a major way, but as a certain point, it seems like 2C yields a closer result than 2C+32. For example, 180C converts to 360 using 2C, much closer to the precise formula.