# 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

 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!

› Celsius to fahrenheit