UnitSnapFahrenheit to Celsius
1 °F = -17.22222 °C
Fahrenheit to Celsius is the conversion for Americans heading abroad, students working in scientific units, and anyone outside the US reading an American recipe, weather report, or medical guideline. The Fahrenheit scale is still standard in everyday US life, so the numbers often need translating for the rest of the world.
When you need to convert degrees Fahrenheit to degrees Celsius
- Following a US recipe that lists oven temperatures such as 350 °F
- Understanding a US weather forecast or heat advisory
- Converting a body temperature reading taken with an American thermometer
- Science and lab coursework, where Celsius and kelvins are standard
How to convert degrees Fahrenheit to degrees Celsius
°C = °F × 0.5555556 − 17.77778
Example: 25 °F = -3.888889 °C
Common temperatures
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| 0 °F | -17.77778 °C |
| 32 °F | 0 °C |
| 50 °F | 10 °C |
| 68 °F | 20 °C |
| 72 °F | 22.22222 °C |
| 98.6 °F | 37 °C |
| 212 °F | 100 °C |
| 325 °F | 162.7778 °C |
| 350 °F | 176.6667 °C |
| 400 °F | 204.4444 °C |
Tips for converting degrees Fahrenheit to degrees Celsius
- Exact formula: subtract 32 first, then multiply by 5/9 (about 0.5556). Multiplying before subtracting is the most common mistake.
- For everyday weather, "subtract 30 and halve" lands within about 2 °C between 30 °F and 85 °F, but is off by more for oven temperatures.
- Every 9 °F change equals exactly 5 °C, which helps when converting a temperature difference rather than a reading.
Fahrenheit to Celsius conversion table
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| -40 °F | -40 °C |
| -20 °F | -28.88889 °C |
| -10 °F | -23.33333 °C |
| 0 °F | -17.77778 °C |
| 10 °F | -12.22222 °C |
| 20 °F | -6.666667 °C |
| 25 °F | -3.888889 °C |
| 30 °F | -1.111111 °C |
| 37 °F | 2.777778 °C |
| 40 °F | 4.444444 °C |
| 50 °F | 10 °C |
| 60 °F | 15.55556 °C |
| 70 °F | 21.11111 °C |
| 80 °F | 26.66667 °C |
| 90 °F | 32.22222 °C |
| 100 °F | 37.77778 °C |
| 150 °F | 65.55556 °C |
| 200 °F | 93.33333 °C |
| 300 °F | 148.8889 °C |
About the units
Fahrenheit: The degree Fahrenheit is the temperature scale used in the United States. Water freezes at 32 °F and boils at 212 °F at sea level.
Celsius: The degree Celsius is the temperature scale used in most of the world. Water freezes at 0 °C and boils at 100 °C at sea level.
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Frequently asked questions
What is 1 degree Fahrenheit in degrees Celsius?
1 degree Fahrenheit equals -17.22222 degrees Celsius.
What is 1 degree Celsius in degrees Fahrenheit?
1 degree Celsius equals 33.8 degrees Fahrenheit.
How do I convert degrees Fahrenheit to degrees Celsius?
Use the formula °C = °F × 0.5555556 − 17.77778.
What is 10 degrees Fahrenheit in degrees Celsius?
10 degrees Fahrenheit equals -12.22222 degrees Celsius.
Related conversions
Factors: NIST SP 811 · SI Brochure · NIST Handbook 44 — Updated