Fahrenheit to Celsius
This converter makes instant conversions from Fahrenheit (°F) to Celsius (°C). It also provides the conversion steps. To use the converter, please provide a value in the input field. The converter will begin making conversions as the values are being typed in.
A Celsius is a unit of temperature on the Celsius scale. Along with the degree Kelvin, it is one of the two units of temperature used within the International System of Units (SI). The Fahrenheit is the unit of temperature in the Fahrenheit scale. Although it is not used within SI, it is still widely used within the United States and some other countries. In most other countries around the world, the Celsius is the officially adopted measurement of temperature.
How to convert Fahrenheit to Celsius
Historically, the definitions of both the Fahrenheit and the Celsius scales were based on the freezing and boiling points of water. In the Fahrenheit scale, the freezing point was 32°F and the boiling point was 212°F at 1 atm pressure. In the Celsius scale, these two points were defined to be 0°C and 100°C. Based on these two definitions, the Fahrenheit to Celsius conversion formula is:
°C = (°F  32) × 

For example, a room temperature of 77 °F can be converted from Fahrenheit to Celsius as:
77°F = (77  32) × 

°C = 25°C 
Even though the definitions of both Fahrenheit and Celsius have changed as scientific understandings evolve, the relationship between the Fahrenheit and Celsius scales remains the same, so the conversion formula above still holds.
Fahrenheit to Celsius chart
The following chart provides a quick reference of various Fahrenheit to Celsius conversions:
Fahrenheit  Celsius  Fahrenheit  Celsius  

50°F  45.6°C  99°F  37.2°C  
20°F  28.9°C  100°F  37.8°C  
0°F  17.8°C  101°F  38.3°C  
10°F  12.2°C  102°F  38.9°C  
20°F  6.7°C  103°F  39.4°C  
32°F  0°C  104°F  40°C  
40°F  4.4°C  105°F  40.6°C  
50°F  10°C  212°F  100°C  
60°F  15.6°C  300°F  148.9°C  
70°F  21.1°C  350°F  176.7°C  
80°F  26.7°C  400°F  204.4°C  
90°F  32.2°C  450°F  232.2°C  
98°F  36.7°C  1000°F  537.8°C 