Celsius Converter
Convert Celsius to Degree Reaumur and more • 15 conversions
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Unit Explanations
Celsius°C
Source UnitCelsius, denoted by the symbol °C, is a scale and unit of measurement for temperature. It is named after the Swedish astronomer Anders Celsius, who developed a similar temperature scale. In the Celsius scale, the freezing point of water is 0 degrees, and the boiling point is 100 degrees under standard atmospheric pressure. This makes it especially useful for scientific calculations and everyday temperature measurements as it aligns closely with the metric system. The Celsius scale is widely used around the world, with the exception of some countries like the United States, which predominantly uses Fahrenheit.
Current Use
The Celsius scale is the most widely used temperature scale in the world today. It is used in most countries for daily temperature measurements. In scientific contexts, it is used alongside the Kelvin scale, which is the SI unit for temperature. The Celsius scale's straightforward alignment with the metric system makes it an ideal choice for educational, scientific, and meteorological purposes.
Fun Fact
The Celsius scale was initially reversed, with 0 as boiling point and 100 as freezing point.
Degree Réaumur°Ré
Target UnitThe degree Réaumur (°Ré) is a temperature scale developed by René Antoine Ferchault de Réaumur in the early 18th century. It is defined such that 0°Ré corresponds to the freezing point of water and 80°Ré corresponds to the boiling point of water at standard atmospheric pressure. The scale is based on the expansion of alcohol or mercury and is less commonly used today, primarily in some European countries. Despite its relative obscurity compared to Celsius and Fahrenheit, it represents a significant historical contribution to the field of thermometry, particularly in the context of early scientific studies in thermodynamics.
Current Use
Today, the degree Réaumur is rarely used in daily life or scientific research. However, it may still be encountered in specific contexts, such as certain industries that have historical ties to this measurement. Some culinary fields in France and Belgium may reference Réaumur for traditional recipes, while it also appears in historical documents and literature. Its use is primarily of academic interest, serving as a reminder of the development of temperature measurement.
Fun Fact
The Réaumur scale was once widely used in Europe, especially in France, but is now considered obsolete.
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= × 1.00000How to Convert
To convert to , multiply the value by 1.00000. This conversion factor represents the ratio between these two units.
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Celsius
temperature • Non-SI
Definition
Celsius, denoted by the symbol °C, is a scale and unit of measurement for temperature. It is named after the Swedish astronomer Anders Celsius, who developed a similar temperature scale. In the Celsius scale, the freezing point of water is 0 degrees, and the boiling point is 100 degrees under standard atmospheric pressure. This makes it especially useful for scientific calculations and everyday temperature measurements as it aligns closely with the metric system. The Celsius scale is widely used around the world, with the exception of some countries like the United States, which predominantly uses Fahrenheit.
History & Origin
The Celsius scale was developed by Swedish astronomer Anders Celsius in 1742. Originally, Celsius devised his scale with 0 as the boiling point of water and 100 as the freezing point, which was later inverted by Carl Linnaeus in 1744 to its current form. This scale quickly became popular due to its straightforward 100-degree interval between the key physical phenomena of freezing and boiling water, which made it intuitive and easy to use, particularly for scientific work.
Etymology: The term 'Celsius' comes from the surname of Anders Celsius, the inventor of this temperature scale.
Current Use
The Celsius scale is the most widely used temperature scale in the world today. It is used in most countries for daily temperature measurements. In scientific contexts, it is used alongside the Kelvin scale, which is the SI unit for temperature. The Celsius scale's straightforward alignment with the metric system makes it an ideal choice for educational, scientific, and meteorological purposes.
💡 Fun Facts
- •The Celsius scale was initially reversed, with 0 as boiling point and 100 as freezing point.
- •Celsius is used by scientists worldwide, except in the U.S., where Fahrenheit is more common.
- •The Celsius scale is often called centigrade, a term derived from Latin meaning 'hundred steps'.
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Degree Réaumur
temperature • Non-SI
Definition
The degree Réaumur (°Ré) is a temperature scale developed by René Antoine Ferchault de Réaumur in the early 18th century. It is defined such that 0°Ré corresponds to the freezing point of water and 80°Ré corresponds to the boiling point of water at standard atmospheric pressure. The scale is based on the expansion of alcohol or mercury and is less commonly used today, primarily in some European countries. Despite its relative obscurity compared to Celsius and Fahrenheit, it represents a significant historical contribution to the field of thermometry, particularly in the context of early scientific studies in thermodynamics.
History & Origin
The degree Réaumur was first proposed by René Antoine Ferchault de Réaumur in 1731. De Réaumur was a French scientist who sought a practical temperature scale based on the properties of liquids. His scale was used extensively in Europe, particularly in France and Germany, for several centuries, primarily in scientific and industrial applications. Over time, however, it was overshadowed by the Celsius scale, which provided a more universal and straightforward application due to its alignment with the metric system.
Etymology: The term 'Réaumur' is derived from the name of the inventor, René Antoine Ferchault de Réaumur, reflecting his contributions to thermometry.
Current Use
Today, the degree Réaumur is rarely used in daily life or scientific research. However, it may still be encountered in specific contexts, such as certain industries that have historical ties to this measurement. Some culinary fields in France and Belgium may reference Réaumur for traditional recipes, while it also appears in historical documents and literature. Its use is primarily of academic interest, serving as a reminder of the development of temperature measurement.
💡 Fun Facts
- •The Réaumur scale was once widely used in Europe, especially in France, but is now considered obsolete.
- •René Antoine Ferchault de Réaumur was also a pioneer in the study of thermodynamics and entomology.
- •The Réaumur scale is sometimes used in historical temperature records, especially in studies of 18th and 19th-century climates.
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