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## #1 2011-01-22 14:21:43

Lazernugget
Member
Registered: 2011-01-22
Posts: 47

### Temperature

I just felt like explaining some Basic formulas. For people who know fractions, and wonder, here are some temperature conversions:

Fahrenheit to Celsius is   5/9 of (F-32)   Or (F-32)x5/9

Celsius to Fahrenheit is  9/5 of (C+32)  Or (C+32)x9/5

Celsius to Kelvin is C+273

Celsius to Rankine is C+273.15 x 9/5

Celsius to Delisle is 100-C x 3/2

Celsius to Newton is C x 33/100

Celsius to Réaumur is C x 4/5

Celsius to Rømer is C x 21/40 + 7.5

((C=Celsius))

Okay, there you go!

MATH......that is all.

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## #2 2011-01-30 11:57:59

byronjordan
Member
Registered: 2011-01-30
Posts: 14

### Re: Temperature

Celsius to Fahrenheit is not 9/5 of (C+32)  Nor (C+32)x9/5.

It is (9/5 of C)+32.

For example 0C is 32F, as the most obvious example. 9/5 of (0C+32) is not equal to 32F, but (9/5 of 0C)+32 is equal to 32F. The formual (9/5 of C)+32 also works on other perhaps obvious examples, like 100C is 212F and -40C is -40F.

Last edited by byronjordan (2011-01-30 12:16:58)

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## #3 2011-02-03 11:22:01

Lazernugget
Member
Registered: 2011-01-22
Posts: 47

### Re: Temperature

Oh yeah, sorry, typed it wrong

MATH......that is all.

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## #4 2014-06-08 03:06:03

ganesh
Registered: 2005-06-28
Posts: 24,692

### Re: Temperature

Hi,

Rankine is a thermodynamic (absolute) temperature scale named after the Glasgow University engineer and physicist William John Macquorn Rankine, who proposed it in 1859. (The Kelvin scale was first proposed in 1848.)

Joseph-Nicolas Delisle (1688–1768), French astronomer for whom the lunar features as well as the temperature scale below are named.

The Réaumur scale, , also known as the "octogesimal division", is a temperature scale in which the freezing and boiling points of water are set to 0 and 80 degrees respectively. The scale is named after René Antoine Ferchault de Réaumur, who first proposed something similar in 1730.

Rømer (also Roemer) is a temperature scale named after the Danish astronomer Ole Christensen Rømer, who proposed it in 1701.
In this scale, the zero was initially set using freezing brine. The boiling point of water was defined as 60 degrees. Rømer then saw that the freezing point of pure water was roughly one eighth of the way (about 7.5 degrees) between these two points, so he redefined the lower fixed point to be the freezing point of water at precisely 7.5 degrees.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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## #5 2014-10-30 22:22:42

DeanPemberton
Member
From: USA
Registered: 2014-10-30
Posts: 20
Website

### Re: Temperature

byronjordan wrote:

Celsius to Fahrenheit is not 9/5 of (C+32)  Nor (C+32)x9/5.

It is (9/5 of C)+32.

For example 0C is 32F, as the most obvious example. 9/5 of (0C+32) is not equal to 32F, but (9/5 of 0C)+32 is equal to 32F. The formual (9/5 of C)+32 also works on other perhaps obvious examples, like 100C is 212F and -40C is -40F.

Yes you are right, the formula posted in thread was wrong, only right hand side is correct left hand side is not correct. The correct formula is that which is posted by you.

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