-1 Fahrenheit to Celsius
-1 degrees Fahrenheit equals
-18.33°C
-18.33 degrees Celsius
-1°F is -18.33°C, well below the point where water freezes. Roads ice over here, and this is where winter forecasts in northern climates spend most of the season. For reference, water freezes at 0°C, or 32°F.
How to convert -1°F to °C
Formula
°C = (°F − 32) × 5/9
Substituting -1°F
- -1 − 32 = -33
- -33 × 5/9 = -18.33
Fahrenheit places the freezing point of water at 32 rather than 0, so that offset comes off first. What remains is then scaled by 5/9, because a Celsius degree covers 1.8 times as much temperature change as a Fahrenheit degree.
How -1°F compares
| Reference point | Temperature | Difference |
|---|---|---|
| Freezing point of water | 0°C / 32°F | 18.3°C (33°F) colder |
| Room temperature | 21°C / 69.8°F | 39.3°C (70.8°F) colder |
| Body temperature | 37°C / 98.6°F | 55.3°C (99.6°F) colder |
| Boiling point of water | 100°C / 212°F | 118.3°C (213°F) colder |