Temperature conversion
-1 °F to °C
-18.33 °C
-1 degrees Fahrenheit = -18.33 degrees Celsius. Exact factor: °C = (°F − 32) × 5/9.
Live converter
Edit either field — the other updates instantly. Type decimal values like 38.4.
The formula
°C = (°F − 32) × 5/9
Worked example: (-1 − 32) × 5/9 = -18.33 °C.
Values near -1 °F
| °F | °C |
|---|---|
| -4 | -20 |
| -3 | -19.44 |
| -2 | -18.89 |
| -1this page | -18.33 |
| 0 | -17.78 |
| 1 | -17.22 |
| 2 | -16.67 |
Frequently asked
How do you convert degrees Fahrenheit to degrees Celsius?
Apply the formula °C = (°F − 32) × 5/9. Enter any value in the live converter above and the result updates as you type.
What is -1 °F in °C?
-1 °F equals -18.33 °C. The reference table below shows the values immediately around -1 °F.
Why does temperature conversion add 32?
The two scales have different zero points and step sizes. Water freezes at 32 °F but 0 °C, so the formula rescales by 5/9 and shifts by the 32-degree offset.