Temperature Converter
Convert Celsius, Fahrenheit, Kelvin, Rankine and Réaumur.
1 degree Celsius equals 33.8 degrees Fahrenheit
About temperature units
A temperature conversion can change both the scale and the zero point. Celsius to Fahrenheit needs a scale factor and an offset; Celsius to Kelvin needs only an offset, while Kelvin to Rankine needs only a scale factor. The converter rejects readings below absolute zero.
These formulas convert temperature readings. For a temperature difference, use only the scale factor: do not add or subtract the zero-point offset.
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The conversions people look up most in this category.
All units
Compare unit values in the base unit. Numbers are rounded to 8 significant digits; conventions and assumptions appear beside the units.
| Unit | Symbol | 1 unit in K |
|---|---|---|
| degree Celsius | °C | 274.15 |
| degree Fahrenheit | °F | 255.92778 |
| kelvinWritten without a degree sign: 300 K, not 300 °K. | K | 1 |
| degree Rankine | °R | 0.55555556 |
| degree Réaumur | °Ré | 274.4 |
All conversion pages
Each page has the formula, worked examples and a reference table.