How to convert Fahrenheit to Celsius
To convert Fahrenheit to Celsius, subtract 32 first, then multiply by 5/9. The subtraction removes the 32-degree offset between the two scales before rescaling.
°C = (°F − 32) × 5/9
For example, (98.6°F − 32) × 5/9 = 37°C. Room temperature of 68°F is 20°C.
Fahrenheit to Celsius conversion table
| Fahrenheit | Celsius |
|---|
Worked examples
Convert 100°F to Celsius
(100 − 32) × 5/9 = 37.8°C — a warm day or a slight fever.
Convert 212°F to Celsius
(212 − 32) × 5/9 = 100°C, the boiling point of water.
Frequently asked questions
100°F is about 37.8°C.
32°F equals 0°C, the freezing point of water.
Because the Fahrenheit scale starts its freezing point at 32 rather than 0, you remove that offset before applying the 5/9 scaling.