31 Fahrenheit to Celsius
31 °F ≈ -0.5556 °C
31 degrees Fahrenheit is approximately -0.5556 degrees Celsius.
How to convert 31 °F to °C
Use the formula °C = (°F − 32) × 5/9:
°C = (31 − 32) × 5/9°C = -1 × 5/9°C = -0.555556
So 31 °F = -0.555556 °C, or about -0.5556 °C rounded.
Rounded values and quick estimate
- Rounded to a whole number: -1 °C
- Rounded to one decimal place: -0.6 °C
Quick mental estimate: subtract 30 and halve it. For 31 °F that gives about 0.5 °C — off by 1.06 °C (190%). Use the exact formula when precision matters.
31 Fahrenheit in other units
-0.56 °C is below the freezing point of water (0 °C / 32 °F), so expect ice and frost. In weather terms it is a cold winter day.
- Celsius
- -0.5556 °C
- Degrees Réaumur
- -0.4444 °Ré
- Degrees Delisle
- 150.83 °De
- Degrees Newton
- -0.1833 °N
- Degrees Rømer
- 7.21 °Rø
- Kelvin
- 272.59 K
- Rankine
- 490.67 °R
31 °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 31 Fahrenheit in Celsius?
31 degrees Fahrenheit is about -0.5556 degrees Celsius (31 °F ≈ -0.5556 °C).
How do you convert 31 °F to °C?
Apply °C = (°F − 32) × 5/9: °C = (31 − 32) × 5/9, °C = -1 × 5/9, °C = -0.555556.
How many degrees Fahrenheit is -0.5556 °C?
-0.5556 °C is about 31 degrees Fahrenheit.