Celsius to Fahrenheit
Celsius and Fahrenheit differ in two ways: they start from different zero points, and a Fahrenheit degree is smaller than a Celsius degree. That is why converting takes a multiplication and an addition. Type any temperature below, or use the chart and shortcuts on this page.
The formula
Celsius to Fahrenheit chart
| Celsius | Fahrenheit | Good to know |
|---|---|---|
| -40 °C | -40 °F | The one temperature where both scales show the same number |
| -10 °C | 14 °F | |
| 0 °C | 32 °F | Water freezes |
| 10 °C | 50 °F | |
| 20 °C | 68 °F | Comfortable room temperature |
| 25 °C | 77 °F | |
| 30 °C | 86 °F | |
| 37 °C | 98.6 °F | Normal body temperature, about |
| 40 °C | 104 °F | |
| 100 °C | 212 °F | Water boils at sea level |
Quick mental math
Double the Celsius number and add 30. For 20 °C that gives 70 °F, while the exact answer is 68 °F. The shortcut stays within about 4 degrees between 0 and 30 °C, which is fine for weather. To go the other way, subtract 30 and halve.
Going the other way
To go from Fahrenheit to Celsius, subtract 32 and then multiply by 5/9: °C = (°F − 32) × 5/9. For example, 68 °F minus 32 is 36, and 36 × 5/9 = 20 °C.
Common questions
At what temperature are Celsius and Fahrenheit the same?
At −40. That is the only point where the two scales agree.
Which countries use Fahrenheit?
The United States is the main one, along with a few places closely tied to it. Most of the world uses Celsius for weather and cooking.
What is normal body temperature in Fahrenheit?
Around 98.6 °F (37 °C). It varies a little by person, time of day and how it is measured.