0°F in °C
0°F is -17.78°C. To convert Fahrenheit to Celsius, take away 32, then divide by 1.8.
Formula from NIST.
Show the workings
| Step | Sum | Answer |
|---|---|---|
| Take away 32 | 0 − 32 | -32 |
| Divide by 1.8 | -32 ÷ 1.8 | -17.778 °C |
Where the figures come from
- Fahrenheit reading at the freezing point used in the conversion: 32 °F. Source: NIST Guide to the SI, Appendix B.9: factors for units listed by kind of quantity. Checked 14 November 2026.
- Fahrenheit degrees in one Celsius degree: 1.8. Source: NIST Guide to the SI, Appendix B.9: factors for units listed by kind of quantity. Checked 14 November 2026.
Nearby temperatures
How to convert Fahrenheit to Celsius
The US National Institute of Standards and Technology gives the conversion as °C = (°F − 32) ÷ 1.8. So to go from °F to °C, take away 32, then divide by 1.8. For example, 0°F is -1778°C.. See NIST's table.
The two scales meet at −40, where −40°C and −40°F are the same temperature.