0 degrees Fahrenheit to degrees Celsius
0 degrees Fahrenheit = -17.7778 degrees Celsius
Formula: degrees Celsius = (degrees Fahrenheit - 32) x 5/9
Zero degrees Fahrenheit is a bitterly cold winter temperature in the United States, and its Celsius value shows the rest of the world just how far below freezing that is.
How to Convert degrees Fahrenheit to degrees Celsius
Fahrenheit converts to Celsius with an affine formula because the scales have different zero points. You subtract 32 from the Fahrenheit value and then multiply by 5/9. The scales coincide only at minus forty degrees, where both read the same number.
The formula is degrees Celsius = (degrees Fahrenheit - 32) x 5/9. Apply the formula to 0 degrees Fahrenheit: 0 - 32 = -32, then -32 x 5/9 = -17.7778 degrees Celsius.
The reverse is just as direct: -17.7778 degrees Celsius equals 0 degrees Fahrenheit. That symmetry is a quick way to sanity-check any conversion you make.
degrees Fahrenheit to degrees Celsius Conversion Table
Use this table to read off nearby values at a glance. The highlighted row is the 0-degrees Fahrenheit conversion from this page.
| degrees Fahrenheit | degrees Celsius |
|---|---|
| 0 | -17.7778 |
| 10 | -12.2222 |
| 20 | -6.6667 |
| 30 | -1.1111 |
| 40 | 4.4444 |
| 50 | 10 |
| 60 | 15.5556 |
| 70 | 21.1111 |
| 80 | 26.6667 |
| 90 | 32.2222 |
| 100 | 37.7778 |
Reverse: degrees Celsius to degrees Fahrenheit
Need to go the other way? -17.7778 degrees Celsius converts back to 0 degrees Fahrenheit. For the full breakdown in that direction, see 0 degrees Celsius to degrees Fahrenheit.
Frequently Asked Questions
What is 0 degrees Fahrenheit in degrees Celsius?
The result is -17.7778 degrees Celsius. To reach it you subtract 32 and multiply by 5/9; the extra step is needed because Celsius and Fahrenheit do not share a zero point.
Why does temperature need an extra add or subtract?
Because the scales are offset, not just stretched. Each has a different zero, so you must scale and then shift. The single point where both scales show the same number is minus forty degrees, a useful sanity check.
What is -17.7778 degrees Celsius back in degrees Fahrenheit?
Run the steps backward and you are back at 0 degrees Fahrenheit. The unit conversion calculator linked below converts temperatures in either direction.
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Disclaimer: This calculator is for informational and educational purposes only. Results are estimates and may not reflect exact values.
Last updated: June 13, 2026