Converting temperature - celsius to fahrenheit


This lesson will teach you how to convert celsius to fahrenheit.


Both celsius and fahrenheit are measures of temperature and are expressed in degrees - degrees celsius °C and degrees fahrenheit °F.


They're named after the Swedish astronomer Anders Celsius (1701 - 1744) and the German physicist Daniel Fahrenheit (1686 - 1736).


Celsius and degrees celsius °C are also known as centigrade and degrees centigrade °C.


A formula for converting celsius into fahrenheit


To convert °C to °F, use the formula



For example, let's change zero degrees celsius (0°C, the freezing point of water) into fahrenheit


°F

=  (°C  x  9/5)  +  32

=  (0  x  9/5)  +  32

=  0  +  32

=  32


Zero degrees celsius (0°C) equals 32 degrees fahrenheit (32°F).


Next convert one hundred degrees celsius (100°C, the boiling point of water) to fahrenheit


°F

=  (°C  x  9/5)  +  32

=  (100  x  9/5)  +  32

=  180  +  32

=  212


One hundred degrees celsius (100°C) is equal to 212 degrees fahrenheit (212°F).


And how about a human's normal body temperature (37°C)?


°F

=  (°C  x  9/5)  +  32

=  (37  x  9/5)  +  32

=  66.6  +  32

=  98.6


Thirty seven degrees celsius (37°C) equals ninety eight point six degrees fahrenheit (98.6°F).


Now try calculating the following in degrees fahrenheit

-10°C

21°C

60°C


The correct answers are

14°F

69°F

140°F


Remember to always show your working - compare your solutions to the following

°F  =  (°C  x  9/5)  +  32  =  (-10  x  9/5)  +  32  =  -18  +  32 =  14

°F  =  (°C  x  9/5)  +  32  =  (21  x  9/5)  +  32  =  37.8  +  32  =  69.8

°F  =  (°C  x  9/5)  +  32  =  (60  x  9/5)  +  32  =  108  +  32  = 140


Why not enter all these figures into a celsius to fahrenheit conversion chart?


Add your own numbers to the chart - it'll save you having to repeat the same calculations and allow you to convert temperatures with ease!


Okay so you can now convert °C to °F ...


... but what about converting °F to °C?


No problem - just continue reading here and you'll soon have the knack of converting fahrenheit back to celsius!


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