Temperature conversion
-18 °C to °F
-0.4 °F
-18 degrees Celsius = -0.4 degrees Fahrenheit. Exact factor: °F = °C × 9/5 + 32.
Live converter
Edit either field — the other updates instantly. Type decimal values like 38.4.
The formula
°F = °C × 9/5 + 32
Worked example: -18 × 9/5 + 32 = -0.4 °F.
Values near -18 °C
| °C | °F |
|---|---|
| -21 | -5.8 |
| -20 | -4 |
| -19 | -2.2 |
| -18this page | -0.4 |
| -17 | 1.4 |
| -16 | 3.2 |
| -15 | 5 |
Frequently asked
How do you convert degrees Celsius to degrees Fahrenheit?
Apply the formula °F = °C × 9/5 + 32. Enter any value in the live converter above and the result updates as you type.
What is -18 °C in °F?
-18 °C equals -0.4 °F. The reference table below shows the values immediately around -18 °C.
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.