What is 0°F in Celsius?
0°F is -17.78°C.
Fahrenheit to Celsius
Type a temperature to convert it from Fahrenheit to Celsius. The two scales do not share a zero, so the conversion shifts as well as scales.
Result
Fahrenheit and Celsius, side by side
Fahrenheit and Celsius measure the same thing on different scales, and they start counting from different places. That is why the conversion is not a simple multiplication: 0°F comes out as -17.78°C, not zero.
Going the other way, 0°C is 32°F. Any converter that treats this as a ratio gets both directions wrong.
The Fahrenheit scale puts water’s freezing point at 32 °F and its boiling point at 212 °F, so the two sit 180 degrees apart against 100 in Celsius. It is the everyday scale in the United States, where normal body temperature is usually quoted as 98.6 °F.
The Celsius scale puts the freezing point of water at 0 °C and its boiling point at 100 °C at sea level. It is the everyday scale in almost every country, and its degree is the same size as the kelvin, offset by exactly 273.15.
| Fahrenheit | Celsius |
|---|---|
| 0 | -17.7778 |
| 10 | -12.2222 |
| 20 | -6.66667 |
| 25 | -3.88889 |
| 30 | -1.11111 |
| 37 | 2.77778 |
| 100 | 37.7778 |
Frequently asked questions
How do I convert Celsius back to Fahrenheit?
Use the same tool with the scales swapped. 0°C is 32°F.
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