Quick Answer:
°C = (°F – 32) × 5/9. To convert Fahrenheit to Celsius, subtract 32 and multiply by 5/9.
Fahrenheit and Celsius are the standard temperature units in weather, cooking, and science.
Detailed Overview: Fahrenheit to Celsius
The Fahrenheit scale sets 32°F at water’s freezing point and 212°F at boiling point. The Celsius scale sets 0°C at freezing and 100°C at boiling. Formula: °C = (°F – 32) × 5/9. Reverse: °F = (°C × 9/5) + 32. Used in meteorology, cooking, and lab work.
Conversion Reference Table
-40°F = -40°C, 32°F = 0°C, 50°F = 10°C, 68°F = 20°C, 86°F = 30°C, 98.6°F = 37°C, 212°F = 100°C
Practical Calculation Example
Convert 77°F: C = (77 – 32) × 5/9 = 25°C. Reverse: 30°C = (30 × 9/5) + 32 = 86°F
Key Takeaways
Formula: °C = (°F – 32) × 5/9. One Fahrenheit degree = 5/9 Celsius degree. At -40 both scales intersect.
THE AUTORANK Editorial Note: The approximation (F – 30) / 2 works best for everyday temperatures between 50°F and 90°F.
Frequently Asked Questions
Q: What is the fastest way to convert Fahrenheit to Celsius in my head?
A: Subtract 30 from the Fahrenheit value and divide by 2. Example: 70°F – 30 = 40, / 2 = 20°C, close to the exact 21.1°C.
A: Subtract 30 from the Fahrenheit value and divide by 2. Example: 70°F – 30 = 40, / 2 = 20°C, close to the exact 21.1°C.
Q: Is 98.6°F exactly 37°C?
A: Yes, 98.6°F equals exactly 37°C, the average human body temperature.
A: Yes, 98.6°F equals exactly 37°C, the average human body temperature.
With (°F – 32) × 5/9 you can convert any temperature accurately in seconds.
Related Converters: Celsius to Fahrenheit | Kelvin to Celsius