Fahrenheit to Celsius
Convert fahrenheit to celsius with the exact factor, a quick reference table and three worked examples. Everything runs in your browser.
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FromFahrenheit (°F)
ToCelsius (°C)
-17.2222°C
°C = °F × 0.555556 − 17.7778Conversion formula
°C = °F × 0.555556 − 17.7778 Multiply by 0.555556, then subtract 17.7778.
Common conversions
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| -40 | -40 |
| 0 | -17.7778 |
| 10 | -12.2222 |
| 20 | -6.6667 |
| 37 | 2.7778 |
| 50 | 10 |
| 100 | 37.7778 |
Worked examples
1
0 °F = -17.7778 °C
2
37 °F = 2.7778 °C
3
100 °F = 37.7778 °C
Frequently asked questions
How many celsius are in one fahrenheit?
One fahrenheit equals -17.2222 celsius. Use °C = °F × 0.555556 − 17.7778 for any value.
What is the conversion formula?
The formula is °C = °F × 0.555556 − 17.7778. Here °F is the input unit and °C is the output unit.
Is the result rounded?
The calculation uses the standard factor 0.555556 and offset -17.7778. Displayed values keep up to six significant digits.