-21.5 Celsius to Fahrenheit
-21.5 degrees Celsius equals
-6.7°F
-6.7 degrees Fahrenheit
-21.5°C is -6.7°F, 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 -21.5°C to °F
Formula
°F = °C × 9/5 + 32
Substituting -21.5°C
- -21.5 × 9/5 = -38.7
- -38.7 + 32 = -6.7
The two scales differ in both their zero point and their step size. A Fahrenheit degree is 5/9 the size of a Celsius degree, and the scales are offset by 32 degrees at the freezing point of water — which is why the conversion needs both a multiplication and an addition.
How -21.5°C compares
| Reference point | Temperature | Difference |
|---|---|---|
| Freezing point of water | 0°C / 32°F | 21.5°C (38.7°F) colder |
| Room temperature | 21°C / 69.8°F | 42.5°C (76.5°F) colder |
| Body temperature | 37°C / 98.6°F | 58.5°C (105.3°F) colder |
| Boiling point of water | 100°C / 212°F | 121.5°C (218.7°F) colder |