# Temperature Converter

This **temperature conversion** tool does real-time conversion of the most popular **temperature scales**.

It is possible to convert degrees Celsius, Fahrenheit, Kelvin, Rankine, Réaumur, Newton, Delisle and Rømer.

At each conversion, the **mathematical formula used** for the specific temperature scale required will be shown.

The in-depth section contains all the conversion formulas used.

## Temperature measurement scales

This section summarizes information about the specific **measurement scales** and **formulas** used for conversion.

### Celsius degrees

The degree Celsius is the most widely used **temperature measurement scale** in the world.

It takes its name from its inventor, the Swedish astronomer **Anders Celsius**.

The Celsius scale is based on setting **two specific points**, *0°C* for the change of state of water from **solid to liquid** and *100 °C* for the transition of water from **liquid to gaseous**.

Scale | Result | Formula | Reverse Formula |
---|---|---|---|

Celsius to Fahrenheit | 1 Celsius is 33.8 Fahrenheit | 33.8°F = (1°C x 9/5) + 32 | 1 °C = (33.8°F - 32) x 5/9 |

Celsius to Kelvin | 1 Celsius is 274.15 Kelvin | 274.15K = 1°C + 273.15 | 1 °C = 274.15K - 273.15 |

Celsius to Rankine | 1 Celsius is 493.47 Rankine | 493.47°R = (1°C x 9/5) + 491.67 | 1 °C = (493.47°R - 491.67) x 5/9 |

Celsius to Réaumur | 1 Celsius is 0.8 Réaumur | 0.8°ré = 1°C x 4/5 | 1 °C = 0.8°ré x 5/4 |

Celsius to Newton | 1 Celsius is 0.33 Newton | 0.33°N = 1°C x 33/100 | 1 °C = 0.33°N x 100/33 |

Celsius to Delisle | 1 Celsius is 148.5 Delisle | 148.5°De = (100 - 1°C) x 3/2 | 1 °C = 100 - 148.5°De x 2/3 |

Celsius to Rømer | 1 Celsius is 8.03 Rømer | 8.03°Rø = 1°C x 21/40 + 7.5 | 1 °C = (8.03°Rø - 7.5) x 40/21 |

### Fahrenheit degrees

The Fahrenheit degree is a **measurement scale for temperature** proposed by the German physicist **Daniel Gabriel Fahrenheit**.

The Fahrenheit degree is mainly used in the United States and some Pacific states.

The **Celsius-like Fahrenheit** scale sets the two points of change of state of water (from solid to liquid and from liquid to gaseous) at *32°F* and respectively *212°F* thus dividing the two intervals into *180°*.

Scale | Result | Formula | Reverse Formula |
---|---|---|---|

Fahrenheit to Celsius | 1 Fahrenheit is -17.22 Celsius | -17.22 °C = (1°F - 32) x 5/9 | 1 °F = (-17.22°C x 9/5) + 32 |

Fahrenheit to Kelvin | 1 Fahrenheit is 255.92 Kelvin | 255.92 K = (1°F + 459.67) x 5/9 | 1 °F = 255.93 K x 9/5 - 459.67 |

Fahrenheit to Rankine | 1 Fahrenheit is 460.67 Rankine | 460.67°R = 1°F + 459.67 | 1°F = 460.67°Ra - 459.67 |

Fahrenheit to Réaumur | 1 Fahrenheit is -13.77 Réaumur | -13.77°ré = (1°F - 32) x 4/9 | 1°F = -13.77°ré x 9/4 + 32 |

Fahrenheit to Newton | 1 Fahrenheit is -5.68 Newton | -5.68°N = (1°F - 32 ) x 11/60 | 1°F = -5.68°N x 60/11 + 32 |

Fahrenheit to Delisle | 1 Fahrenheit is 175.83 Delisle | 175.83°De = (212 - 1°F) x 5/6 | 1°F = 212 - 175.83°De x 6/5 |

Fahrenheit to Rømer | 1 Fahrenheit is -1.54 Rømer | -1.54°Rø = (1°F - 32) x 7/24 + 7.5 | 1°F = (-1.54°Rø - 7.5) x 24/7 + 32 |

### Kelvin degrees

The Kelvin scale is named in honor of the British physicist **Lord Kelvin**.

The Kelvin scale is based on **two specific points**, the **absolute zero** to which the value *0 K* is attributed and the **triple point of the water** to which the value *273.16 K* is attributed.

Scale | Result | Formula | Reverse Formula |
---|---|---|---|

Kelvin to Celsius | 1 Kelvin is -272.15 Celsius | -272.15°C = 1K - 273.15 | 1K = -272.15°C + 273.15 |

Kelvin to Fahrenheit | 1 Kelvin is -457.87 Fahrenheit | -457.87°F = 1K x 9/5 - 459.67 | 1K = (-457.87°F + 459.67) x 5/9 |

Kelvin to Rankine | 1 Kelvin is 1.8 Rankine | 1.8°R = 1K x 9/5 | 1K = 1.8°Ra x 5/9 |

Kelvin to Réaumur | 1 Kelvin is -217.72 Réaumur | -217.72°ré = (1K - 273.15) x 4/5 | 1K = -217.72°ré x 5/4 + 273.15 |

Kelvin to Newton | 1 Kelvin is -89.8 Newton | -89.8°N = (1K - 273.15) x 33/100 | 1K = -89.8°N x 100/33 + 273.15 |

Kelvin to Delisle | 1 Kelvin is 558.22 Delisle | 558.22°De = (373.15 - 1K) x 3/2 | 1K = 373.15 - 558.22°De x 2/3 |

Kelvin to Rømer | 1 Kelvin is -135.38 Rømer | -135.38°Rø = (1K - 273.15) x 21/40 + 7.5 | 1K = (-135.38°Rø - 7.5) x 40/21 + 273.15 |

### Rankine degrees

The Rankine scale is a disused **temperature measurement scale** proposed by the Scottish engineer **William John Macquorn Rankine**.

The scale range is **similar** to that of the **Fahrenheit scale**, but the zero is simply shifted to the value of **absolute zero**.

Scale | Result | Formula | Reverse Formula |
---|---|---|---|

Rankine to Celsius | 1 Rankine is -272.6 Celsius | -272.6°C = (1°Ra - 491.67) x 5/9 | 1°Ra = (-272.6°C x 9/5) + 491.67 |

Rankine to Fahrenheit | 1 Rankine is -458.67 Fahrenheit | -458.67°F = 1°Ra - 459.67 | 1°Ra = -458.67°F + 459.67 |

Rankine to Kelvin | 1 Rankine is 0.56 Kelvin | 0.56K = 1°Ra x 5/9 | 1°Ra = 0.56K x 9/5 |

Rankine to Réaumur | 1 Rankine is -218.08 Réaumur | -218.08°Ré = (1°Ra - 491.67) x 4/9 | 1°Ra = -218.08°Ré x 9/4 + 491.67 |

Rankine to Newton | 1 Rankine is -89.96 Newton | -89.96°N = (1°Ra - 491.67) x 11/60 | 1°Ra = -89.96°N x 60/11 + 491.67 |

Rankine to Delisle | 1 Rankine is 558.89 Delisle | 558.89°De = (671.67 - 1°Ra) x 5/6 | 1°Ra = 671.67 - 558.89°De x 6/5 |

Rankine to Rømer | 1 Rankine is -135.61 Rømer | -135.61°Rø = (1°Ra - 491.67) x 7/24 + 7.5 | 1°Ra = (-135.61°Rø - 7.5) x 24/ 7 + 491.67 |

### Réaumur degrees

The Réaumur scale is a **temperature measurement scale** proposed by **René-Antoine Ferchault de Réaumur**.

The Réaumur degree is defined as *1/80* of the difference between the **boiling point of water** and the **solidification point of water**.

Scale | Result | Formula | Reverse Formula |
---|---|---|---|

Réaumur to Celsius | 1 Réaumur is 1.25 Celsius | 1.25°C = 1°ré x 5/4 | 1°ré = 1.25°C x 4/5 |

Réaumur to Fahrenheit | 1 Réaumur is 34.25 Fahrenheit | 34.25°F = 1°ré x 9/4 + 32 | 1°ré = (34.25°F - 32) x 4/9 |

Réaumur to Kelvin | 1 Réaumur is 274.4 Kelvin | 274.4K = 1°ré x 5/4 + 273.15 | 1°ré = (274.4K - 273.15) x 4/5 |

Réaumur to Rankine | 1 Réaumur is 493.92 Rankine | 493.92°Ra = 1°ré x 9/4 + 491.67 | 1°ré = (493.92°Ra - 491.67) x 4/9 |

Réaumur to Newton | 1 Réaumur is 0.41 Newton | 0.41°N = 1°ré x 33/80 | 1°ré = 0.41°N x 80/33 |

Réaumur to Delisle | 1 Réaumur is 148.12 Delisle | 148.12°De = (80 - 1°ré) x 15/8 | 1°ré = 80 - 148.12°De x 8/15 |

Réaumur to Rømer | 1 Réaumur is 8.16 Rømer | 8.16°Rø = 1°ré x 21/32 + 7.5 | 1°ré = (8.16°Rø - 7.5) x 32/21 |

### Newton degrees

The Newton scale is a **measurement scale for temperature** proposed by **Isaac Newton**.

The Newton degree is equal to *100/33* of the **Celsius** degree sharing the value of *0*.

Scale | Result | Formula | Reverse Formula |
---|---|---|---|

Newton to Celsius | 1 Newton is 3.03 Celsius | 3.03°C = 1°N x 100/33 | 1°N = 3.03°C x 33/100 |

Newton to Fahrenheit | 1 Newton is 37.45 Fahrenheit | 37.45°F = 1°N x 60/11 + 32 | 1°N = (37.45°F - 32 ) x 11/60 |

Newton to Kelvin | 1 Newton is 276.18 Kelvin | 276.18K = 1°N x 100/33 + 273.15 | 1°N = (276.18K - 273.15) x 33/100 |

Newton to Rankine | 1 Newton is 497.12 Rankine | 497.12°Ra = 1°N x 60/11 + 491.67 | 1°N = (497.12°Ra - 491.67) x 11/60 |

Newton to Réaumur | 1 Newton is 2.42 Réaumur | 2.42°Ré = 1°N x 80/33 | 1°N = 2.42°Ré x 33/80 |

Newton to Delisle | 1 Newton is 145.45 Delisle | 145.45°D = (33 - 1°N) x 50/11 | 1°N = 33 - 145.45°D x 11/50 |

Newton to Rømer | 1 Newton is 9.09 Rømer | 9.09°Rø = 1°N x 35/22 + 7.5 | 1°N = (9.09°Rø - 7.5) x 22/35 |

### Delisle degrees

The Delisle scale is a **measurement scale for temperature** proposed by **Joseph-Nicolas Delisle**.

The Delisle scale has been in use for almost **100 years in Russia** and in which the value **increases** with **decreasing temperature**.

The Delisle scale sets two points, *0* for **boiling water** and *150* for **freezing**.

Scale | Result | Formula | Reverse Formula |
---|---|---|---|

Delisle to Celsius | 1 Delisle is 99.33 Celsius | 99.33°C = 100 - 1°De x 2/3 | 1°De = (100 - 99.33°C) x 3/2 |

Delisle to Fahrenheit | 1 Delisle is 210.8 Fahrenheit | 210.8°F = 212 - 1°De x 6/5 | 1°De = (212 - 210.8°F) x 5/6 |

Delisle to Kelvin | 1 Delisle is 372.48 Kelvin | 372.48K = 373.15 - 1°De x 2/3 | 1°De = (373.15 - 372.48K) x 3/2 |

Delisle to Rankine | 1 Delisle is 670.47 Rankine | 670.47°Ra = 671.67 - 1°De x 6/5 | 1°De = (671.67 - 670.47°Ra) x 5/6 |

Delisle to Réaumur | 1 Delisle is 79.47 Réaumur | 79.47°Ré = 80 - 1°De x 8/15 | 1°De = (80 - 79.47°Ré) x 15/8 |

Delisle to Newton | 1 Delisle is 32.78 Newton | 32.78°N = 33 - 1°De x 11/50 | 1°De = (33 - 32.78°N) x 50/11 |

Delisle to Rømer | 1 Delisle is 59.65 Rømer | 59.65°Rø = 60 - 1°De x 7/20 | 1°De = (60 - 59.65°Rø) x 20/7 |

### Rømer degrees

The Rømer scale is a **measurement scale for temperature** proposed by the Danish astronomer **Ole Christensen Rømer**.

This scale **unlike the others** is based on fixing the two freezing and boiling points using a **brine solution**.

The colons are set to *0* and *60*, respectively.

Scale | Result | Formula | Reverse Formula |
---|---|---|---|

Rømer to Celsius | 1 Rømer is -12.38 Celsius | -12.38°C = (1°Rø - 7.5) x 40/21 | 1°Rø = -12.38°C x 21/40 + 7.5 |

Rømer to Fahrenheit | 1 Rømer is -12.38 Fahrenheit | 9.71°F = (1°Rø - 7.5) x 24/7 + 32 | 1°Rø = (9.71°F - 32) x 7/24 + 7.5 |

Rømer to Kelvin | 1 Rømer is 260.77 Kelvin | 260.77K = (1°Rø - 7.5) x 40/21 + 273.15 | 1°Rø = (260.77K - 273.15) x 21/40 + 7.5 |

Rømer to Rankine | 1 Rømer is 469.39 Rankine | 469.39°Ra = (1°Rø - 7.5) x 24/ 7 + 491.67 | 1°Rø = (469.39°Ra - 491.67) x 7/24 + 7.5 |

Rømer to Réaumur | 1 Rømer is -9.9 Réaumur | -9.9°Ré = (1°Rø - 7.5) x 32/21 | 1°Rø = -9.9°Ré x 21/32 + 7.5 |

Rømer to Newton | 1 Rømer is -4.08 Newton | -4.08°N = (1°Rø - 7.5) x 22/35 | 1°Rø = -4.08°N x 35/22 + 7.5 |

Rømer to Delisle | 1 Rømer is 168.57 Delisle | 168.57°De = (60 - 1°Rø) x 20/7 | 1°Rø = 60 - 168.57°De x 7/20 |

## Useful links

This is a list of links with insights into temperature scales.