1 °F = -17.2 °C
1 degree Fahrenheit is -17.222222 degrees Celsius, to six decimal places.
- Precise
- -17.222222 °C
- Rounded
- -17.2 °C
- Formula
- (1 − 32) × 5/9
Convert any other temperature
Type in either box; the other follows, and the scale moves with it. Works for decimals and, for temperatures, numbers below zero.
Around 1 °F
Fahrenheit to Celsius for the whole numbers either side of 1, rounded to one decimal place. Each row opens its own page.
| Degrees Fahrenheit | Degrees Celsius |
|---|---|
| -4 °F | -20 °C |
| -3 °F | -19.4 °C |
| -2 °F | -18.9 °C |
| -1 °F | -18.3 °C |
| 0 °F | -17.8 °C |
| 1 °F | -17.2 °C |
| 2 °F | -16.7 °C |
| 3 °F | -16.1 °C |
| 4 °F | -15.6 °C |
| 5 °F | -15 °C |
| 6 °F | -14.4 °C |
How to convert Fahrenheit to Celsius
The formula
°C = (°F − 32) × 5/9. The two scales start from different zero points, so there is a subtraction as well as a multiplication.
Worked through for 1
Subtract 32: 1 − 32 = -31. Multiply by 5/9: -31 × 5 ÷ 9 = -17.222222. Rounded, that is -17.2 °C.
In your head
Take away 30 and halve it: 70 °F → 40 ÷ 2 = 20 °C (close enough for weather).
Questions
What is 1 °F in Celsius?
1 degree Fahrenheit is -17.222222 degrees Celsius to six decimal places, or -17.2 °C rounded to one decimal place.
How do you convert degrees Fahrenheit to degrees Celsius?
Use (1 − 32) × 5/9, which gives -17.222222. For a quick estimate: Take away 30 and halve it: 70 °F → 40 ÷ 2 = 20 °C (close enough for weather).
Is 1 °F hot or cold?
1 °F is -17.2 °C: below freezing; water turns to ice.
What is 1 °C in Fahrenheit?
Going the other way, 1 °C is 33.8 °F. The reverse conversion has its own page and converter.
Is the answer exact?
The exact answer has endless decimals, so it is shown to six places (-17.222222). The rounded figure, -17.2, is accurate enough for weather, cooking and thermometers.