TEMPERATURE CONVERSION

[PALM MOD]

Fahreheit to Celsius

Thanks to mike453.

[BigFrond]

Tc - To Celsius

Tf - To Fahrenheit

Formulas:

Tc = (5/9) * (Tf-32)

Tf = (5/9 * Tc) - 32

The value F:149 to C:70.0 on the chart is wrong, at least by my calculation.

[BigFrond]

Tc - To Celsius

Tf - To Fahrenheit

Formulas:

Tc = (5/9) * (Tf-32)

Tf = (9/5 * Tc) - 32

The value F:149 to C:70.0 on the chart is wrong, at least by my calculation.

Oops... it should b 5/9 for Tc and 9/5 for Tf

[PALM MOD]

A site I checked has the formulas as:

Tc = (5/9)*(Tf-32)

Tf = (9/5)*Tc+32

But that still doesn't get the correct result. I get 70 degrees C = 158 degrees F

I checked another conversion site and 70 degrees C = 158 degrees F on that site as well.

Hmmmm

[BigFrond]

A site I checked has the formulas as:

Tc = (5/9)*(Tf-32)

Tf = (9/5)*Tc+32

But that still doesn't get the correct result.

I checked another conversion site and 70 degrees C = 158 degrees F.

Hmmmm

I checked and it is correct. Only the last F value is incorrect. It should be 158.

[BS Man about Palms]

A site I checked has the formulas as:

Tc = (5/9)*(Tf-32)

Tf = (9/5)*Tc+32

But that still doesn't get the correct result.

I checked another conversion site and 70 degrees C = 158 degrees F.

Hmmmm

I checked and it is correct. Only the last F value is incorrect. It should be 158.

I see that. For some reason the F raised the one degree like previous, but they jumped the C side by 5.6C to match!! Ooops-TYPO!

[John Case]

Dean,

Found this on the web

Does this work or is this the Da Vinci code?

<form name="inputForm"><script language="JavaScript" src="http://www.metric-conversions.org/temperature/-to-fahrenheit.js"></script><table width="53%" border="1" bordercolor="#000000"><tr><td colspan="2"><font size="-2" face="Verdana, Arial, Helvetica, sans-serif"><strong><a href="http://www.metric-conversions.org/temperature/-to-fahrenheit.htm"> to Fahrenheit conversion</a></strong></font></td></tr><tr><td width="72%"><table width="100%%" border="0"><tr><td width="56%"><font size="-2" face="Verdana, Arial, Helvetica, sans-serif">Enter </font></td><td width="44%"><font size="-2"><input name="arguement" type="text" id="arguement" size="10" maxlength="10"></font></td></tr></table></td><td width="28%"><input type="button" name="Button" value="convert" onClick="java script:convert()"></td></tr><tr><td colspan="2"><table width="100%%" border="0"><tr><td width="66%"><font size="-2" face="Verdana, Arial, Helvetica, sans-serif">Value in Fahrenheit</font></td><td width="34%"><font size="-2"> </font><font size="-2" face="Verdana, Arial, Helvetica, sans-serif"><input name="result" type="text" id="result" size="10" maxlength="10"></font></td></tr></table></td></tr><tr><td colspan="2"><div align="center"><font size="-2" face="Verdana, Arial, Helvetica, sans-serif"><strong>provided by <a href="http://www.metric-conversions.org">metric conversions</a></strong></font></div></td></tr></table></form>

or you can try this, which works everytime:

To convert from F to C, try these calculations manually.

98.6 + 40 = 138.6, and 138.6 * 5/9 = 77. For the final calculation, remove the 40. 77 - 40 = 37

To convert from C to F, try these calculations manually.

37 + 40 = 77, and 77 * 9/5 = 138.6. For the final calculation, remove the 40. 138.6 - 40 = 98.6

In summary, add 40, (F to C) multiply by Fraction...(C to F) multiply by the other, subtract 40.

[John in Andalucia]

My brain hurts. You can always use this: Converter

I'll take suggestions for any other goodies you want to see on this page.

[George Sparkman]

Hi John,

how about adding some of your experiences regarding minimum temperatures ?

When I first started having a page listing minimum temperatures on my site

I added a converter.

It seemed very cybernational and useful since most palms grow in zones

where temperatures are measured in celsius not fahrenheit

(sounds like something that belongs on a German Autobahn).

George Sparkman

Cycads-n-Palms.com

[John in Andalucia]

Hi John,

how about adding some of your experiences regarding minimum temperatures ?

When I first started having a page listing minimum temperatures on my site

I added a converter.

It seemed very cybernational and useful since most palms grow in zones

where temperatures are measured in celsius not fahrenheit

(sounds like something that belongs on a German Autobahn).

George Sparkman

Cycads-n-Palms.com

Hi George,

I was thinking of keeping that particular web page as a "gadgets" page for gardeners. I'm also working on a palm database that I first proposed for the IPS. You can see a "rough" of it here. Viewing password is "lipstick". It might yet be of some use.

[joe_OC]

Hi John,

how about adding some of your experiences regarding minimum temperatures ?

When I first started having a page listing minimum temperatures on my site

I added a converter.

It seemed very cybernational and useful since most palms grow in zones

where temperatures are measured in celsius not fahrenheit

(sounds like something that belongs on a German Autobahn).

George Sparkman

Cycads-n-Palms.com

Hi George,

I was thinking of keeping that particular web page as a "gadgets" page for gardeners. I'm also working on a palm database that I first proposed for the IPS. You can see a "rough" of it here. Viewing password is "lipstick". It might yet be of some use.

Hi John,

Did you see the palm wiki that Dean has created? It's called palmpedia. I think my contribution to the palm world is to help populate that wiki with more information on palms. Everyone can contribute as it is too big of a job for any one person to do.

Joe

[joe_OC]

Hi John,

how about adding some of your experiences regarding minimum temperatures ?

When I first started having a page listing minimum temperatures on my site

I added a converter.

It seemed very cybernational and useful since most palms grow in zones

where temperatures are measured in celsius not fahrenheit

(sounds like something that belongs on a German Autobahn).

George Sparkman

Cycads-n-Palms.com

Hi George,

I was thinking of keeping that particular web page as a "gadgets" page for gardeners. I'm also working on a palm database that I first proposed for the IPS. You can see a "rough" of it here. Viewing password is "lipstick". It might yet be of some use.

Hi John,

Did you see the palm wiki that Dean has created? It's called palmpedia. I think my contribution to the palm world is to help populate that wiki with more information on palms. Everyone can contribute as it is too big of a job for any one person to do.

Joe

[John in Andalucia]

Hi John,

how about adding some of your experiences regarding minimum temperatures ?

When I first started having a page listing minimum temperatures on my site

I added a converter.

It seemed very cybernational and useful since most palms grow in zones

where temperatures are measured in celsius not fahrenheit

(sounds like something that belongs on a German Autobahn).

George Sparkman

Cycads-n-Palms.com

Hi George,

I was thinking of keeping that particular web page as a "gadgets" page for gardeners. I'm also working on a palm database that I first proposed for the IPS. You can see a "rough" of it here. Viewing password is "lipstick". It might yet be of some use.

Hi John,

Did you see the palm wiki that Dean has created? It's called palmpedia. I think my contribution to the palm world is to help populate that wiki with more information on palms. Everyone can contribute as it is too big of a job for any one person to do.

Joe

Hi Joe,

Yes, I have Palmpedia bookmarked. Regarding the link I posted, my web skills outweigh my palm knowledge, so a while ago I volunteered to help start a palm database for the IPS after a request for volunteers was posted on the forum. It formed part of a discussion between several IPS directors and myself, but it's not something I intended to cultivate (as I have nursery business to take care of), once the IPS web team get started on it. I also have my own business website, so that's where the majority of my office time is spent - and here of course!

[freakypalmguy]

Another way for C to F conversion is,

Double the Celsius number, then subtract 10% of that result, then add 32

Example: 10C X 2 = 20, then 20 - 10% = 18, then 18 + 32 = 50F

Example: 25C X 2 = 50, then 50 - 10% = 45, then 45 + 32 = 77F

[BS Man about Palms]

Dean- Can this thread be flagged so it is at the top of this area and easy to find?

Bill

[FRITO]

a rough estimation you can do in your head to convert F to C is double the C then add 30 degrees, usually gets you withing 2 degrees F.

10C X 2 = 20 + 30= 50F

[BS Man about Palms]

My brain hurts. You can always use this: Converter

I'll take suggestions for any other goodies you want to see on this page.

It would be neat if we could have this converterbe at the top of the page with the IPS logo...

you know, easily found.

[peachy]

Why bother with conversions ? If its 40c its very hot. 4c is very cold. Every country in the world is using Celsius but one, the same country that doesnt use metric either. Hmmmm. Instead of getting headaches trying to convert things into some archaic system that nobody else uses, why not just get in sync with the rest of the world.

Peachy

[John in Andalucia]

In the UK many people still revert to Fahrenheit to illustrate just how hot the weather might be. Very occasionally the UK weather will top 90F - something of a magical figure. It harks back to the summer of 1976 when we had a persistent heatwave that has never been matched in duration since. So in the UK they use both. It depends on who you talk to, and that's the difference. Talking about the temperature will reveal both Fahrenheit and Celsius fans, whereas printed data will always be in Celsius, because it is the scientific standard in every country, including the US. The TV weather reporters in the UK still say, "26 Celsius.. that's nearly 80F!" and many folk will recall the summer of 1976. Should it ever reach 100F* in the UK, then that's what would be printed on the front page of every tabloid newspaper, but the data on the weather page would be printed in Celsius. Growing up, we used to say, "double it and add 30" to recall Fahrenheit. It worked within a certain range. I prefer Celsius simply because 0C is freezing, and that to me makes more sense. It's probably why the scientists prefer it too.

*The all-time highest temperature recorded in Britain (since records began) still stands at Brogdale near Faversham in Kent on 10th August, 2003 - 38.5 Celsius, 101.3 Fahrenheit.

Bill, that Celsius and Fahrenheit converter on my website has to include the "Script courtesy of.." link. That is how I was able to customize it for use on my site.

[Exotic Life]

I don't use a converter but count on my own with a formule that works out.

From Celcius to Fahrenheit -> ??C * 1.8 + 32 = ??F

Example with 10C -> 10C * 1.8 + 32 = 50F

Or otherwise.

From Fahrenheit to Celcius -> ??F - 32 / 1.8 = ??C

Example with 86F -> 86F / 1.8 - 32 = 30C

Easy... and I do prefer 30C more then 50F!

Edited August 18, 2009 by Exotic Life

[Steve]

I've pasted a link below to a local National Weather Service website from El Paso, TX that has quite a few conversions. In addition to C to F conversions, it will calculate heat index, dewpoint at known temp and RH, RH at known temp and dewpoint, wind chill, etc.

http://www.srh.noaa.gov/elp/wxcalc/wxcalc.shtml

It's been pretty handy for me. Hope you all enjoy it as well!

[Kathryn]

That's a cool web page John. Are you looking for help populating it?

[Kathryn]

The calculations Dean posted are correct - I actually remember them from high school. Here is a chart using those calculations.

100 ºF = 38 ºC

95 ºF = 35 ºC

90 ºF = 32 ºC

85 ºF = 29 ºC

80 ºF = 27 ºC

75 ºF = 24 ºC

70 ºF = 21 ºC

65 ºF = 18 ºC

60 ºF = 16 ºC

55 ºF = 13 ºC

50 ºF = 10 ºC

45 ºF = 7 ºC

40 ºF = 4 ºC

35 ºF = 2 ºC

30 ºF = -1 ºC

25 ºF = -4 ºC

20 ºF = -7 ºC

15 ºF = -9 ºC

10 ºF = -12 ºC

5 ºF = -15 ºC

0 ºF = -18 ºC

I like using Fahrenheit when referring to the weather because it makes more sense to me - I am familiar with what 32ºF feels like versus 50ºF. Interestingly, the chemical plants I've worked in usually used Celsius and the refineries used Fahrenheit.

[John in Andalucia]

That's a cool web page John. Are you looking for help populating it?

Kathryn, I'm happy to add more features if others will find it useful, and are interested to bookmark it. Maybe some other palm/gardening-relevant conversions?

[sarasota alex]

I put this table together for my father-in-law who frequently visits from Ukraine. The values are rounded up to the nearest integer. If anyone's interested I could send the Excel file behind this table with all the formulas. Makes it easier to print.

[Cristóbal]

I dont understand why in united states they use fahrenheit and other things not of the metric system. and i dont think this is to change. If you watch united states tv and see the newspapers they never put metric things and if you go on the streets there the speed is always miles. And most the members in palmtalk i think are of united states, all the time i must change fahrenheit to celsius, and make feet centimeters or meters. I learn now some things about this system, but why they dont learn the system they use in all the other countrys of the world ?

i use this page for this:

metric - us system

[OldNed]

Like FRITO said. Here's my post from a few years ago-good enough for everyday quick use:

Posted 04 March 2007 - 09:06 PM

Here's a quick method for rough conversion from degrees C to degrees F:

Multiply Cº by two.... then add 30 to get approx. Fº (that's it !)

Examples....

0º C x 2 = 0 plus 30 = 30ºF (actual is 32ºF)

5º C x 2 = 10 plus 30 = 40ºF (actual is 41º)

10º C x 2 = 20 plus 30 = 50º (same as actual)

15ºC....60ºF (59ºF)

20ºC....70ºF (68ºF)

25ºC....80ºF....(77ºF)

30ºC....90ºF (86ºF)

35ºC....100ºF (95ºF)

No good at at temps outside of survival range for humans (and palms) but not a bad rough method for quick conversion

[peachy]

Sorry folks, there is only one easy way to solve this problem. Citizens of the USA, time to get with the program and catch up with the rest of the planet. I don't even try convert, gives me a headache.

Peachy

[tjwalters]

Sorry folks, there is only one easy way to solve this problem. Citizens of the USA, time to get with the program and catch up with the rest of the planet. I don't even try convert, gives me a headache.

Peachy

Agreed. But until we do, we'll have to convert. That's why I added this simple calculator to my web site years ago.

[daxin]

I grew up with metric system and it was simple: water freezes at 0C, boils at 100C, 10C is cold, 30C is hot, 20C is just right. It took me a long time to get used to Fahrenheits. For other metric folks that are new to this relic system, a good number sequence to remember is 68F, 77F, and 86F. These have a bit of symmetry with 6,7,8, and correspond to 20C, 25C, and 30C. It is basically 9F for every 5C. BTW, water freezes at 32F and boils at 212F, and -40F is the same as -40C.

[Jim in Los Altos]

Don't hold your breath waiting for the change. There was a big push for the metric system here over thirty years ago and very little has changed since then.

[Palehorse]

Don't hold your breath waiting for the change. There was a big push for the metric system here over thirty years ago and very little has changed since then.

Yea, I remember us being taught the Metric system in elementary school in preparation for the big changeover. The whole push kinda died on the vine unfortunately. It really is easier to use mathematically but folks here in the States just don't have a good "feel" for what a kilometer is verses a mile or a millimeter verses an ounce. One of the previous posters use the same in the head conversion that I use. Take the C, double it and then add 30 = F. Or take F, subtract 30 and divide it in half = C. Not exact but it gets you real close

[The Germinator]

Why bother with conversions ? If its 40c its very hot. 4c is very cold. Every country in the world is using Celsius but one, the same country that doesnt use metric either. Hmmmm. Instead of getting headaches trying to convert things into some archaic system that nobody else uses, why not just get in sync with the rest of the world.

Peachy

That would be too easy. They told us in grammar school that in ten years we would be converted to metric. Tha was over 30 years ago.

[velutina]

Sorry folks, there is only one easy way to solve this problem. Citizens of the USA, time to get with the program and catch up with the rest of the planet. I don't even try convert, gives me a headache.

Peachy

I agree peachy. The US system is ridiculous. Luckily, my profession only uses metric, so i'm bilingual in a sense.

[velutina]

Sorry folks, there is only one easy way to solve this problem. Citizens of the USA, time to get with the program and catch up with the rest of the planet. I don't even try convert, gives me a headache.

Peachy

I agree peachy. The US system is ridiculous. Luckily, the medical field here uses metric, so i'm bilingual in a sense.

Edited July 14, 2010 by velutina

[Walter John]

I think the NFL with it's football field dimensions marked in yards has too much power for a change in a system of measurement.

maybe that's not so funny

[cagary]

During the years I lived in Taiwan, I came up with a way to convert C to F.

I memorized just 3 pairs of numbers.

10 50 (nice even numbers!)

20 68

30 86 (see how you just reverse "68"?)

We already know (or you should know!) 0 C. equals 32F (Freezing)

So if its a little less than 10, its in the 40's; a little higher than 10, its in the 50's.

You can also see that the F. jumps are always 18. (50 plus 18 equals 68. 68 plus 18 equals 86).

So half of 18 is 9. Therefore, 15 C equals 59F.

But don't make it too complicated, just remember the 3 pairs of numbers.

BTW these pairs give you exact conversions, not approximations.

[tjwalters]

A bit odd that this is in the "Discussing Palm Trees Worldwide" forum. (Not complaining, mind you.)