1 Fahrenheit to Celsius
1 °F ≈ -17.22 °C
1 degree Fahrenheit is approximately -17.22 degrees Celsius.
How to convert 1 °F to °C
Use the formula °C = (°F − 32) × 5/9:
°C = (1 − 32) × 5/9°C = -31 × 5/9°C = -17.222222
So 1 °F = -17.222222 °C, or about -17.22 °C rounded.
Rounded values and quick estimate
- Rounded to a whole number: -17 °C
- Rounded to one decimal place: -17.2 °C
Quick mental estimate: subtract 30 and halve it. For 1 °F that gives about -14.5 °C — off by 2.72 °C (15.8%). Use the exact formula when precision matters.
1 Fahrenheit in other units
-17.22 °C is very cold weather, well below the freezing point of water. It is typical of a hard winter in northern climates; warm layers, gloves and a hat are essential outdoors.
- Celsius
- -17.22 °C
- Degrees Réaumur
- -13.78 °Ré
- Degrees Delisle
- 175.83 °De
- Degrees Newton
- -5.68 °N
- Degrees Rømer
- -1.54 °Rø
- Kelvin
- 255.93 K
- Rankine
- 460.67 °R
1 °F and nearby values
About fahrenheit and celsius
The Fahrenheit scale puts water’s freezing point at 32 °F and boiling point at 212 °F. It is the everyday temperature scale in the United States.
The Celsius scale sets the freezing point of water at 0 °C and its boiling point at 100 °C (at sea level). It is used for everyday temperatures in almost every country.
Related conversions
Frequently asked questions
What is 1 Fahrenheit in Celsius?
1 degree Fahrenheit is about -17.22 degrees Celsius (1 °F ≈ -17.22 °C).
How do you convert 1 °F to °C?
Apply °C = (°F − 32) × 5/9: °C = (1 − 32) × 5/9, °C = -31 × 5/9, °C = -17.222222.
How many degrees Fahrenheit is -17.22 °C?
-17.22 °C is about 1 degrees Fahrenheit.