To convert celsius to fahrenheit, multiply by 9, divide by 5 and add 32.  To convert fahrenheit to celsius, subtract 32, multiply by 5 and divide by 9. The table below lists some conversions from fahrenheit to celsuis, rounded off to the nearest whole number.

0 degrees F                -18 degrees C
10 degress F               -12 degrees Celsius
25 degrees F                -4 degrees Celsius
32 degress F                    0 degrees Celsius
50 degrees F                 10 degrees Celsius
68 degrees F                 20 degrees Celsius
100 degrees F             38 degrees Celsius
212 degrees F             100 degrees Celsius