Temperature Scales
The degree Fahrenheit (°F) is a unit of temperature named for the german physicist Gabriel Fahrenheit (1686 - 1736). In the Fahrenheit scale of temperature the freezing point of water is 32 degrees and the boiling point is 212 degrees placing the boiling and melting points of water 180 degrees apart. Zero degrees Fahrenheit indicates the lowest temperature Fahrenheit could obtain by a mixture of ice and salt.

The degree Celsius (°C) is a unit of temperature named for the Swedish astronomer Anders Celsius (1701-1744) who first proposed it. The Celsius temperature scale was designed so that the freezing point of water is 0 degrees and the boiling point is 100 degrees at standard atmospheric pressure. Since there are one hundred steps between these two reference points the original term for this system was Centigrade (100 parts).

            Formula    Fahrenheit to Celsius Conversion    

Fahrenheit to Celsius Conversion

Take temperature in Fahrenheit then subtract 32 from the number.  Then multiply the number by 5 then divide by 9.

Example A) Convert 68 Fahrenheit to Celsius.  Take 68 subtract 32.  Then multiply by 5.  Then divide by 9. Answer is 20 Celsius.

Example B) Convert 110 Fahrenheit to Celcius.  Take 110 subtract 32.  Then multiply by 5.  Then divide by 9.  Answer is 43.3 Celsius.

            Formula    Celsius to Fahrenheit  Conversion    

Take temperature in Celsius multiply by 9 then divide by 5 then add 32.

Example A) Convert 20 Celsius to Fahrenheit. Take 20 and multiply by 9 then divide by 5.  Then add 32.  Answer is 68 Fahrenheit.

Example B) Convert 43.3 Celsius to Fahrenheit.  Take 43.3 multiply by 9 then divide by 5.  Then add 32.  Answer is 109.94 Fahrenheit.

                          Work the Following Problems           

1) Convert 30 Celsius to Fahrenheit. 

2) Convert 37 Celsius to Fahrenheit. 

3) Convert 118 Fahrenheit to Celsius. 

4) Convert 58 Fahrenheit to Celsius.

5) Convert 98.6 Fahrenheit to Celsius.