Now the temperature has started to drop. The months of October and November have set records for the highest average temperature over a 24-hour period. The coming weekend reports temperatures down to around the freezing point.

Celsius scale, or centigrade scale, is a temperature scale that is based on the freezing point of water at 0°C and the boiling point of water at 100°C. Fahrenheit scale is a temperature scale that is based on the freezing point of water at 32°F and the boiling point of water at 212°F.

Fahrenheit to Celsius Estimate Formula

Use this formula to get a good estimate of the Celsius temperature when converting from Fahrenheit. In this case / means divided by or to use division.

(Fahrenheit temp. [F]-30)/2 = Celsius temp.

In other words, if you’d like to convert a Fahrenheit temperature to an approximate Celsius temperature:

1. Start with the temperature in Fahrenheit (e.g., 100 degrees).
2. Subtract 30 from this figure (e.g., 100 – 30 = 70).
3. Divide your answer by 2 (e.g., 70 / 2 = 35).

Fahrenheit to Celsius Exact Formula

If you want a more precise calculation, you can use the more exact formula. Using this calculation, we determine that 100 degrees Fahrenheit is equivalent to 37.78 degrees Celsius.

(F – 32) / 1.8 = C

In other words, if you’d like to convert a temperature reading in Fahrenheit to Celsius:

1. Start with the temperature in Fahrenheit (e.g., 100 degrees).
2. Subtract 32 from this figure (e.g., 100 – 32 = 68).
3. Divide your answer by 1.8 (e.g., 68 / 1.8 = 37.78)

Converting Celsius to Fahrenheit

To convert Celsius to Fahrenheit, simply reverse the equation. In this case * means times, or to use multiplication.

(C * 1.8) + 32 = F

You can use this equation to show that 100 degrees Celsius is equal to 212 degrees Fahrenheit.

1. Start with the temperature in Celsius (e.g., 100 degrees).
2. Multiply this figure by 1.8 (e.g., 100 * 1.8 = 180).
3. Add 32 to this figure (e.g., 180 + 32 = 212).