0 Fahrenheit to Celsius
0 °F ≈ -17.78 °C
0 degrees Fahrenheit is approximately -17.78 degrees Celsius.
How to convert 0 °F to °C
Use the formula °C = (°F − 32) × 5/9:
°C = (0 − 32) × 5/9°C = -32 × 5/9°C = -17.777778
So 0 °F = -17.777778 °C, or about -17.78 °C rounded.
Rounded values and quick estimate
- Rounded to a whole number: -18 °C
- Rounded to one decimal place: -17.8 °C
Quick mental estimate: subtract 30 and halve it. For 0 °F that gives about -15 °C — off by 2.78 °C (15.6%). Use the exact formula when precision matters.
0 Fahrenheit in other units
0 °F (−17.8 °C) is the standard setting for home freezers and a very cold winter day.
-17.78 °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
- -17.78 °C
- Degrees Réaumur
- -14.22 °Ré
- Degrees Delisle
- 176.67 °De
- Degrees Newton
- -5.87 °N
- Degrees Rømer
- -1.83 °Rø
- Kelvin
- 255.37 K
- Rankine
- 459.67 °R
0 °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 0 Fahrenheit in Celsius?
0 degrees Fahrenheit is about -17.78 degrees Celsius (0 °F ≈ -17.78 °C).
How do you convert 0 °F to °C?
Apply °C = (°F − 32) × 5/9: °C = (0 − 32) × 5/9, °C = -32 × 5/9, °C = -17.777778.
How many degrees Fahrenheit is -17.78 °C?
-17.78 °C is about -0.004 degrees Fahrenheit.
What is 0 °F in Celsius?
−17.8 °C, usually rounded to −18 °C — the recommended freezer temperature.