Forum | Thinking With Portals

#51 · September 15, 2009, 1:25 pm

jrlauer wrote:

To convert Celsius to Fahrenheit in your head you just double it and add 30. That will get you within a few degrees. So if it's 20C multiply it by 2 to get 40 and add 30 = 70F. That's approximate but it's pretty close.

I'd mentioned before that it was 104F before. That would make it about 37C.

That's a very useful rule of thumb. Thanks!

Uh...

You don't happen to know something similar for kilometers and miles, do you? :oops:

"Duct Tape is the answer."

#52 · September 15, 2009, 1:29 pm

Ricotez wrote:

That's a very useful rule of thumb. Thanks!

Uh...

You don't happen to know something similar for kilometers and miles, do you? :oops:

I do. To convert km into miles, multiply by 5 and divide by 8.

Trivia: this is the very second account I registered with the nickname ASBusinessMagnet, after my YouTube channel.

#53 · September 15, 2009, 1:54 pm

ASBusinessMagnet wrote:

I do. To convert km into miles, multiply by 5 and divide by 8.

I was actually thinking about something I could do quickly, in my head, but still thanks.

"Duct Tape is the answer."

#54 · September 15, 2009, 3:37 pm

ASBusinessMagnet wrote:

You didn't notice the last check; it was exact.

Sorry, sometimes I read to fast and I skip a word or two.

Ricotez wrote:

I was actually thinking about something I could do quickly, in my head, but still thanks.

I think ( *5/8 ) is the only one. At least the only one I know of.

#55 · September 15, 2009, 3:54 pm

jrlauer wrote:

I think ( *5/8 ) is the only one. At least the only one I know of.

So you did know that formula.

Trivia: this is the very second account I registered with the nickname ASBusinessMagnet, after my YouTube channel.

#56 · September 16, 2009, 1:19 pm

ASBusinessMagnet wrote:

So you did know that formula.

I think I remember hearing about that formula, or one like it, several years ago. I didn't remember it until you posted it.

#57 · September 16, 2009, 1:46 pm

jrlauer wrote:

I think I remember hearing about that formula, or one like it, several years ago. I didn't remember it until you posted it.

I've read about it in the English Wikipedia.

en.wikipedia.org wrote:

The formula "multiply by 8 and divide by 5" to convert miles to kilometers gives a conversion of 1.6. As it is only slightly lower than the actual conversion factors, it is a useful approximation.

Trivia: this is the very second account I registered with the nickname ASBusinessMagnet, after my YouTube channel.

#58 · September 18, 2009, 5:29 pm

Wikipedia, the know all of everything.

I got the temp formula from my highschool science teacher.