Fahrenheit to Celsius Converter
Convert degrees Fahrenheit to degrees Celsius in your browser, with a full reference table and the formula behind it. Free, instant, no sign-up.
How to convert degrees Fahrenheit to degrees Celsius
°C = (°F − 32) × 5/9
Subtract 32 first to line up the freezing points, then scale the degrees. Doing it in the other order is the single most common mistake. The converter above is already set to degrees Fahrenheit and degrees Celsius, so you can type any value and read the answer straight away.
Fahrenheit to Celsius conversion table
Common values, worked out in advance:
| Degrees fahrenheit (°F) | Degrees celsius (°C) |
|---|---|
| 0 °F | -17.7778 °C |
| 5 °F | -15 °C |
| 10 °F | -12.2222 °C |
| 15 °F | -9.4444 °C |
| 20 °F | -6.6667 °C |
| 25 °F | -3.8889 °C |
| 30 °F | -1.1111 °C |
| 35 °F | 1.6667 °C |
| 37 °F | 2.7778 °C |
| 40 °F | 4.4444 °C |
| 100 °F | 37.7778 °C |
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Frequently asked questions
How many degrees Celsius are in 1 °F?
One °F is -17.2222 °C. The table above covers the values people look up most often.
What is the formula to convert degrees Fahrenheit to degrees Celsius?
°C = (°F − 32) × 5/9. Subtract 32 first to line up the freezing points, then scale the degrees. Doing it in the other order is the single most common mistake.
Is this fahrenheit to celsius converter accurate?
Yes. It uses the exact internationally defined conversion factors and calculates in your browser, so nothing is rounded until the result is displayed.
Can I convert degrees Celsius back to degrees Fahrenheit here?
Yes. Use the swap button in the converter to reverse the direction, or pick any other pair of units from the two dropdowns.