How to convert it
- Multiply by 9/5 (1.8): -18 × 1.8 = -32.4.
- Add 32: -32.4 + 32 = -0.4 °F.
F = (C x 9/5) + 32
That is deep-freeze territory — around the temperature of a home freezer (−18 °C / 0 °F).
Temperature
-18 °C in Fahrenheit
Quick answer, the exact math, and nearby values. Need a different number? Use the Celsius to Fahrenheit Converter - Free.
Nearby values
| Value | Result |
|---|---|
| -20 °C in Fahrenheit | -20 °C = -4 °F |
| -19 °C in Fahrenheit | -19 °C = -2.2 °F |
| -18 °C in Fahrenheit | -18 °C = -0.4 °F |
| -17 °C in Fahrenheit | -17 °C = 1.4 °F |
| -16 °C in Fahrenheit | -16 °C = 3.2 °F |
| -15 °C in Fahrenheit | -15 °C = 5 °F |
| -14 °C in Fahrenheit | -14 °C = 6.8 °F |
| -13 °C in Fahrenheit | -13 °C = 8.6 °F |
| -12 °C in Fahrenheit | -12 °C = 10.4 °F |
Frequently asked questions
What is -18 °C in Fahrenheit?
-18 °C = -0.4 °F (about 0 °F).
How is it calculated?
Multiply by 9/5 (1.8): -18 × 1.8 = -32.4. Add 32: -32.4 + 32 = -0.4 °F.
Conversion factors follow: NIST Special Publication 811 — Guide for the Use of the International System of Units (SI); BIPM — The International System of Units (SI Brochure, 9th edition).