-20 Fahrenheit to Celsius
-20 °F ≈ -28.89 °C
-20 degrees Fahrenheit is approximately -28.89 degrees Celsius.
How to convert -20 °F to °C
Use the formula °C = (°F − 32) × 5/9:
°C = (-20 − 32) × 5/9°C = -52 × 5/9°C = -28.888889
So -20 °F = -28.888889 °C, or about -28.89 °C rounded.
Rounded values and quick estimate
- Rounded to a whole number: -29 °C
- Rounded to one decimal place: -28.9 °C
Quick mental estimate: subtract 30 and halve it. For -20 °F that gives about -25 °C — off by 3.89 °C (13.5%). Use the exact formula when precision matters.
-20 Fahrenheit in other units
-28.89 °C is very cold weather, well below the freezing point of water. It is typical of a hard winter in northern climates; warm layers, gloves and a hat are essential outdoors.
- Celsius
- -28.89 °C
- Degrees Réaumur
- -23.11 °Ré
- Degrees Delisle
- 193.33 °De
- Degrees Newton
- -9.53 °N
- Degrees Rømer
- -7.67 °Rø
- Kelvin
- 244.26 K
- Rankine
- 439.67 °R
-20 °F and nearby values
About fahrenheit and celsius
The Fahrenheit scale puts water’s freezing point at 32 °F and boiling point at 212 °F. It is the everyday temperature scale in the United States.
The Celsius scale sets the freezing point of water at 0 °C and its boiling point at 100 °C (at sea level). It is used for everyday temperatures in almost every country.
Related conversions
Frequently asked questions
What is -20 Fahrenheit in Celsius?
-20 degrees Fahrenheit is about -28.89 degrees Celsius (-20 °F ≈ -28.89 °C).
How do you convert -20 °F to °C?
Apply °C = (°F − 32) × 5/9: °C = (-20 − 32) × 5/9, °C = -52 × 5/9, °C = -28.888889.
How many degrees Fahrenheit is -28.89 °C?
-28.89 °C is about -20 degrees Fahrenheit.