**To convert celsius to réaumur this temperature calculator uses Reaumur (°Re) = Celsius (°C) × 0.8 formula to help transform temperatures from Celsius scale to the historical Réaumur scale. **

The **Réaumur scale**, developed by French scientist **René Antoine Ferchault de Réaumur** in 1730, was predominantly used in Europe, particularly in France and Germany, during the **18th and 19th centuries**.

If you need to convert 25°C using Celsius to Réaumur converter, simply input 25 into the calculator, and it will automatically display

20°Réas the result.

## Celsius to Reaumur Converter

Celsius (°C) | Réaumur (°R) |
---|---|

1 | 0.8 |

2 | 1.6 |

3 | 2.4 |

4 | 3.2 |

5 | 4.0 |

6 | 4.8 |

7 | 5.6 |

8 | 6.4 |

9 | 7.2 |

10 | 8.0 |

15 | 12.0 |

20 | 16.0 |

25 | 20.0 |

30 | 24.0 |

35 | 28.0 |

40 | 32.0 |

45 | 36.0 |

50 | 40.0 |

55 | 44.0 |

60 | 48.0 |

65 | 52.0 |

70 | 56.0 |

75 | 60.0 |

80 | 64.0 |

85 | 68.0 |

90 | 72.0 |

95 | 76.0 |

100 | 80.0 |

## Celsius to Réaumur Conversion Formula

Celsius to Réaumur conversion formula multiply the Celsius temperature by **0.8**:

**Formula: °Ré = °C × 0.8**

Since both scales use 0° as the freezing point of water, but Réaumur uses 80° for boiling while Celsius uses 100°, the ratio becomes **80/100 = 0.8**.

To convert 30°C to Réaumur:

- °Ré = 30°C × 0.8
- °Ré =
24

## How to Convert Celsius to Réaumur?

The conversion process follows these detailed steps:

**Identify**the temperature in Celsius.**Multiply**the Celsius value by**0.8**.**Express**the result in degrees Réaumur (°Ré).

Let’s convert 50°C to Réaumur:

Take the temperature: **50°C**

Multiply by **0.8**: 50 × 0.8 = **40**

Final result: 50°C = **40°Ré**

## What is 80 Degree Réaumur?

80 degrees Réaumur (80°Ré) represents the **boiling point of water** in the Réaumur scale. This temperature is equivalent to **100°C** in the Celsius scale, demonstrating the different ways these scales divide the range between water’s freezing and boiling points.

**To convert 80°Ré to Celsius:**

- °C = °Ré ×
1.25- °C = 80 ×
1.25- °C =
100

## References

Royal Society of Chemistry: https://www.rsc.org/periodic-table/history/

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