Fahrenheit
Definition: Fahrenheit (°F) is a unit of temperature that was widely used before metrication. Two points describe it: water freezes at 32°F, and water boiling point is 212°F at sea level and normal atmospheric pressure. The freezing and boiling point interval is divided into 180 parts.
Celsius
Definition: The Celsius (°C) is an SI (International System of Units) derived temperature unit. Also called centigrade, the scale is based on 0° for the freezing point and 100° for the boiling point of water at standard atmosphere and sea level pressure. It has a 100-degree interval between the defined point.
Fahrenheit to Celsius formula
To convert temperatures in degrees Fahrenheit to Celsius, subtract 32 and multiply by .5556 (or 5/9).
- Example: (50°F – 32) x .5556 = 10°C
How to convert Fahrenheit to Celsius
0 degrees Fahrenheit is equal to -17.77778 degrees Celsius:
0 °F = -17.77778 °C
T(°C) = (T(°F) – 32) × 5/9
or
T(°C) = (T(°F) – 32) / (9/5)
or
T(°C) = (T(°F) – 32) / 1.8
How to Convert Temperatures
The formula for converting ºF to ºC:
- C = 5/9 x (F-32)
The C represents the temperature in Celsius, and F is the temperature in Fahrenheit. Follow the three steps to convert ºF to ºC.
- Subtract 32 from the Fahrenheit temperature.
- Multiply this number by five.
- Divide the result by nine.
Example
Convert 68 degrees Fahrenheit to degrees Celsius:
T(°C) = (68°F – 32) × 5/9 = 20 °C
Example: convert 50 °F to °C
50 °F = (50 – 32) × 5/9 = 10 °C
Fahrenheit to Celsius Chart
| Fahrenheit (°F) | Celsius (°C) |
| -459.67 °F | -273.15 °C |
| -50 °F | -45.56 °C |
| -40 °F | -40.00 °C |
| -30 °F | -34.44 °C |
| -20 °F | -28.89 °C |
| -10 °F | -23.33 °C |
| 0 °F | -17.78 °C |
| 10 °F | -12.22 °C |
| 20 °F | -6.67 °C |
| 30 °F | -1.11 °C |
| 32 °F | 0 °C |
| 40 °F | 4.44 °C |
| 50 °F | 10.00 °C |
| 60 °F | 15.56 °C |
| 70 °F | 21.11 °C |
| 80 °F | 26.67 °C |
| 90 °F | 32.22 °C |
| 98.6 °F | 37 °C |
| 100 °F | 37.78 °C |
| 110 °F | 43.33 °C |
| 120 °F | 48.89 °C |
| 130 °F | 54.44 °C |
| 140 °F | 60.00 °C |
| 150 °F | 65.56 °C |
| 160 °F | 71.11 °C |
| 170 °F | 76.67 °C |
| 180 °F | 82.22 °C |
| 190 °F | 87.78 °C |
| 200 °F | 93.33 °C |
| 212 °F | 100 °C |