# Unit Converter: Temperature (Celsius, Fahrenheit, Kelvin)

• Convert temperature units such as Celsius, Fahrenheit, and Kelvin to each other.
• Round to the 14th decimal place.

 Celsius °C Fahrenheit °F Kelvin K Rankine °R Delisle °De Newton °N Réaumur °Ré Rømer °Rø
* About the notation of "e": Numbers with many digits may be displayed as "1e9". This is a computer exponential notation, where “e” represents a power of 10.
1e3 = 103 = 1,000
1e6 = 106 = 1,000,000
1e9 = 109 = 1,000,000,000
1e-3 = 10-3 = 0.001
1e-6 = 10-6 = 0.000001
1e-9 = 10-9 = 0.000000001

* This tool does not check the lower limit, so even if it is less than 0 Kelvin, it will be converted without error. Please note.

## Temperature conversion formula

### Fahrenheit

$[°F] = [°C] \times {\dfrac {9}{5}} + 32$ $[°C] = ([°F] - 32) \times {\dfrac {5}{9}}$

### Kelvin

$[K] = [°C] + 273.15$ $[°C] = [K] - 273.15$

### Rankine

$[°R] = ([°C] + 273.15) \times {\dfrac {9}{5}}$ $[°C] = ([°R] - 491.67) \times {\dfrac {5}{9}}$

### Delisle

$[°De] = (100 - [°C]) \times {\dfrac {3}{2}}$ $[°C] = 100 - [°De] \times {\dfrac {2}{3}}$

### Newton

$[°N] = [°C] \times {\dfrac {33}{100}}$ $[°C] = [°N] \times {\dfrac {100}{33}}$

### Réaumur

$\text{[°Ré]} = [°C] \times {\dfrac {4}{5}}$ $[°C] = \text{[°Ré]} \times {\dfrac {5}{4}}$

### Rømer

$\text{[°Rø]} = [°C] \times {\dfrac {21}{40}} + 7.5$ $[°C] = (\text{[°Rø]} - 7.5) \times {\dfrac {40}{21}}$