To convert from Fahrenheit to Celsius: C° = (F° - 32)/9 x 5
- Begin by subtracting 32 from the Fahrenheit number.
- Divide the answer by 9.
- Then multiply that answer by 5.
OR skip a step...
C° = (F° - 32) x (5 / 9)
- Begin by subtracting 32 from the Fahrenheit number.
- Divide 5 by 9.
- Then multiply that answer to first number
Since 5/9 will always be 0.5555555 you can just skip the second step and multiply the first number to it.
For example:
C° = (F° - 32) x 0.555555
*(Where [F-32] is evenly divisable by 9, this will spoil the integer result.)
To convert from Celsius to Fahrenheit: F° = (C° x 9/5) +32
- Begin by multiplying the Celsius temperature by 9.
- Divide the answer by 5.
- Now add 32.
Or, as above, you can use the decimal 1.8 instead of 9/5
F° = (C° x 1.8) +32