Temperature Conversion Celsius to Fahrenheit

Temperature Converter: F to C or C to F!


Looking to change F to C or C to F? Use our Celsius to Fahrenheit temperature converter or see our temperature conversion chart.

About Fahrenheit and Celsius

The Fahrenheit temperature scale is named for German physicist Daniel Gabriel Fahrenheit and is used primarily in the United States.

The Celsius temperature scale—originally centigrade and later renamed for Swedish astronomer Anders Celsius—is used almost everywhere else in the world.

F to C: Fahrenheit to Celsius Conversion Calculator


Enter a value for Fahrenheit or Celsius to convert to the other.

F to C: Fahrenheit to Celsius Conversion Formula

To convert temperatures in degrees Fahrenheit to Celsius, subtract 32 and multiply by .5556 (or 5/9).

  • Example: (50°F - 32) x .5556 = 10°C

Fahrenheit to Celsius Conversion Chart



-40°F -40°C
-30°F -34°C
-20°F -29°C
-10°F -23°C
0°F -18°C
10°F -12°C
20°F -7°C
32°F 0°C
40°F 4°C
50°F 10°C
60°F 16°C
70°F 21°C
80°F 27°C
90°F 32°C
100°F 38°C

C to F: Celsius to Fahrenheit Conversion Formula

To convert temperatures in degrees Celsius to Fahrenheit, multiply by 1.8 (or 9/5) and add 32.

  • Example: 30°C x 1.8 + 32 = 86°F

Celsius to Fahrenheit Conversion Chart



-40°C -40°F
-30°C -22°F
-20°C -4°F
-10°C 14°F
0°C 32°F
10°C 50°F
20°C 68°F
30°C 86°F
40°C 104°F
50°C 122°F
60°C 140°F
70°C 158°F
80°C 176°F
90°C 194°F
100°C 212°F

Other Conversions

  • Another interesting temperature conversion is turning cricket chirps into degrees F. Did you know that crickets can tell you how cold it is? Find out how to do the conversion here!
  • Looking for some cooking conversions? This page has everything you need to know about easy substitutions and conversions in the kitchen.
  • If you’re a little confused about Celsius, chances are that the metric system might be tough for you too. Check out another handy conversion chart for the metric system.


This article was originally published in 2008 and is regularly updated.

Reader Comments

Leave a Comment

Easy Way to Convert from Celsius to Fahrenheit:

Instead of using F=(9/5)C+32; it is easier if you don't have a calculator to use (2)C+32-C/5.

Estimates are easy if you round to the nearest 5.


20C = 2(20)+32-20/5=40+32-4=68F

The benefit of using this formula is that it is easier to use in your head and the answer is exact; So it works in a calculator too!

My reference notes from what I learned here

Convert Celsius To Fahrenheit
1. Multiply # By 1.8

2. 20x1.8=36

3. Add (32)

4. 36+32=68

Convert Fahrenheit To Celsius

1. Subtract (32) From #

2. 68-32=36

3. Multiply by .5556 (or 5/9)

4. 36x.5556=20

4.1. Or 56 Instead Of .5556
4.2. 36x56=2016
4.3. Remove 16

Using Method 5 Divided By 9
1. Multiply By 5
2. 36x5=180
3. Divide By 9
4. Turn 9 To 10
5. 180/10
6. Half 180 To 90 And 10 To 5
7. Half 90 To 40 And 5 To 2
8. Half 40 to 20 And 2 To 1
9. 20/1=20

7. 40 is easier to half then 45
Keep going until you can't half 10 anymore or don't half 2

My notes to help remember this. Used to be good at math suck at it now


This was very helpful! Thanks so much!

82•F - 32 = 50 (now) 50*.556

82•F - 32 = 50 (now)
50*.556 = 27.8•C (exact)

Unless you need the EXACT

Unless you need the EXACT number, you can do a quick conversion in your head:

70F - 32 = 38 divided by 2 = 19, then add 1 or 2(remember, this is close enough, not exact)= 21C. The exact conversion would be 21.1.

Another example is 40F - 32 = 8 divided by 2 = 4C. For a lower F temperature to start with, you don't have to add much. In this case, the exact conversion is 4.4.

why is it so many formula

why is it so many formula method to convert in the different version?

F into C Subtract 32,

F into C
Subtract 32, multiplyng by 5, and Divided by 9

50 F = C
90/9=10 C

gud to understand but update

gud to understand but update the information day to day

Gud to start spelling

Gud to start spelling correctly, too #itsspeltgood

Easiest way: Google it. Type

Easiest way: Google it. Type "convert x degrees Fahrenheit into Celsius" That goes for many measurements. For example, kg-pounds, m-inch and etc. It works both ways.

Yo ppl! Conversion of C to

Yo ppl!

Conversion of C to F.
Take the value of C, multiply it by 2.
then subtract the first digit of the answer from the answer, then simply add 32.
Example: 10C to F ?

Go vice versa too.
Have fun!

This will not work is above

This will not work is above 99C or below -99 C
C to F
C+40 *9/5-40=F
will work at any temp

Copied from wikitravel.org: A

Copied from wikitravel.org:
A nice little poem to remember for Celsius...
Zero is freezing.
10 is not.
20 is warm.
and 30 is hot!

It's even easier.... If you

It's even easier....
If you notice, the Celcius and Fahrenheit scales are equal at -40 degrees.
The conversion formula (to go either way) would be
temp = (old temp + 40) X - 40

where X is 5/9 to convert to Celcius
and X is 9/5 to convert to Fahrenheit

One formula does the trick.
To Convert 0 degrees Celcius to Fahrenheit:
temp = (0 + 40) 9/5 + 40
temp = 40 * 9/5 + 40
temp = 72 - 40
temp = 32 degrees Fahrenheit

Thank you so much! My math

Thank you so much! My math book is so complicated. Instead of just simply saying what you said, It said

F + 9/5C + 32

9/5C + 32 + F

9/5C + 32 - 32 = F -32

9/5C = F - 32

5/9 x 9/5C = 5/9(F-32)

C = 5/9(F - 32)


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