Degrees Celsius to degrees Fahrenheit – and degrees Fahrenheit to degrees Celsius
°F = °C × 1.8 + 32
All units in this category
- 20°C
- 68°F
- 293.15K
Formula
Temperature is not converted with a simple factor but with a formula that also accounts for the zero point.
How to convert degrees Celsius to degrees Fahrenheit
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Degrees Celsius to degrees Fahrenheit – common values
| Degrees Celsius (°C) | Degrees Fahrenheit (°F) |
|---|---|
| -40 | -40 |
| -20 | -4 |
| -10 | 14 |
| 0 | 32 |
| 10 | 50 |
| 20 | 68 |
| 25 | 77 |
| 30 | 86 |
| 37 | 98.6 |
| 100 | 212 |
Degrees Fahrenheit to degrees Celsius – common values
| Degrees Fahrenheit (°F) | Degrees Celsius (°C) |
|---|---|
| -40 | -40 |
| -20 | -28.8889 |
| -10 | -23.3333 |
| 0 | -17.7778 |
| 10 | -12.2222 |
| 20 | -6.66667 |
| 25 | -3.88889 |
| 30 | -1.11111 |
| 37 | 2.77778 |
| 100 | 37.7778 |
About the units
Degrees Celsius. The degree Celsius is an SI unit with its own name, exactly the same size as the kelvin but with a shifted zero: a temperature in degrees Celsius is the temperature in kelvin minus 273.15. It is a legal unit in the EU and the standard in weather reports, cooking and medicine outside the US. The name was adopted in 1948, replacing “centigrade”. Water freezes at 0 degrees and boils at roughly 100, but the boiling point is no longer exactly 100: the scale is defined through the kelvin.
Degrees Fahrenheit. The degree Fahrenheit has no definition of its own in the SI; it is fixed by its relation to Celsius, where degrees Celsius are degrees Fahrenheit minus 32, divided by 1.8. One degree Fahrenheit is therefore exactly five ninths of a kelvin. The scale is in everyday and weather use in the US but is absent from the EU units directive. 0 °F is −17.8 °C and 100 °F is 37.8 °C. The conversion is not a factor but a linear function: a difference of 10 °F is 5.6 °C.