Fahrenheit to Celsius Calculation Guide
Learn how to calculate and convert degrees Fahrenheit (°F) to Celsius (°C).
Enter Value
Conversion Result
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Formula & Conversion Step:
What is the Fahrenheit to Celsius Formula?
The Fahrenheit ($^\circ$F) to Celsius ($^\circ$C) calculation is the definitive formula used by Americans traveling abroad or US scientists submitting papers to global journals.
The Core Algorithm
The two scales have different freezing points (32 vs 0) and different sizes per degree. First, the formula subtracts 32 from the Fahrenheit input to align the freezing points. Then, it multiplies by $5/9$ to compress the Fahrenheit degree into the larger Celsius degree.
$$ T_{(^\circ\text{C})} = (T_{(^\circ\text{F})} - 32) \times \frac{5}{9} $$
The standard subtraction and compression algorithm used globally.
Example Calculation
Let's calculate standard human body temperature ($98.6 ^\circ\text{F}$). First, subtract 32 ($98.6 - 32 = 66.6$). Next, multiply by 5 ($66.6 \times 5 = 333$). Finally, divide by 9 ($333 \div 9 = 37$). Therefore, human body temperature is exactly $37 ^\circ\text{C}$.