-4 °F = -20 °C
-4 degrees Fahrenheit is -20 degrees Celsius exactly.
- Exact
- -20 °C
- Rounded
- -20 °C
- Formula
- (-4 − 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 -4 °F
Fahrenheit to Celsius for the whole numbers either side of -4, rounded to one decimal place. Each row opens its own page.
| Degrees Fahrenheit | Degrees Celsius |
|---|---|
| -9 °F | -22.8 °C |
| -8 °F | -22.2 °C |
| -7 °F | -21.7 °C |
| -6 °F | -21.1 °C |
| -5 °F | -20.6 °C |
| -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 |
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 -4
Subtract 32: -4 − 32 = -36. Multiply by 5/9: -36 × 5 ÷ 9 = -20. Rounded, that is -20 °C.
In your head
Take away 30 and halve it: 70 °F → 40 ÷ 2 = 20 °C (close enough for weather).
Questions
What is -4 °F in Celsius?
-4 degrees Fahrenheit is -20 degrees Celsius, or -20 °C rounded to one decimal place.
How do you convert degrees Fahrenheit to degrees Celsius?
Use (-4 − 32) × 5/9, which gives -20. For a quick estimate: Take away 30 and halve it: 70 °F → 40 ÷ 2 = 20 °C (close enough for weather).
Is -4 °F hot or cold?
-4 °F is -20 °C: bitterly cold, below the temperature of a home freezer.
What is -4 °C in Fahrenheit?
Going the other way, -4 °C is 24.8 °F. The reverse conversion has its own page and converter.
Is the answer exact?
Yes. -4 °F converts to exactly -20 °C; the rounded figure is only for convenience.