How to convert degrees Fahrenheit to degrees Celsius
°C = (°F − 32) × 5/9
Example: 25 °F → -3.88889 °C
Temperature scales have different zero points, so you cannot convert them with a single multiplication factor.
Fahrenheit to Celsius table
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| -40 °F | -40 °C |
| -20 °F | -28.888889 °C |
| -10 °F | -23.333333 °C |
| 0 °F | -17.777778 °C |
| 10 °F | -12.222222 °C |
| 15 °F | -9.4444444 °C |
| 20 °F | -6.6666667 °C |
| 25 °F | -3.8888889 °C |
| 30 °F | -1.1111111 °C |
| 35 °F | 1.6666667 °C |
| 37 °F | 2.7777778 °C |
| 40 °F | 4.4444444 °C |
| 50 °F | 10 °C |
| 60 °F | 15.555556 °C |
| 80 °F | 26.666667 °C |
| 100 °F | 37.777778 °C |
| 150 °F | 65.555556 °C |
| 200 °F | 93.333333 °C |
About these units
Fahrenheit (°F): Fahrenheit (°F) puts water’s freezing point at 32° and boiling point at 212°. It is used for everyday temperatures in the United States.
Celsius (°C): Celsius (°C) sets 0° at the freezing point and about 100° at the boiling point of water at sea level. It is used for weather in almost every country.
Frequently asked questions
How do you convert degrees Fahrenheit to degrees Celsius?
To convert degrees Fahrenheit to degrees Celsius, use °C = (°F − 32) × 5/9. For example, 25 °F = -3.88889 °C.
How do I convert °F to °C?
Use the formula °C = (°F − 32) × 5/9. For example, 25 °F gives -3.88889 °C.
How do I convert degrees Celsius back to degrees Fahrenheit?
Use the reverse formula on our Celsius to Fahrenheit page, or press Swap in the converter above.
What is the Fahrenheit scale?
Fahrenheit (°F) puts water’s freezing point at 32° and boiling point at 212°. It is used for everyday temperatures in the United States.
Conversion factors come from exact international definitions (NIST SP 811, BIPM) where they exist. Results show up to 10 significant digits. Need every temperature unit at once? Use the Temperature Converter.