Temperature units converter

Convert Celsius to Fahrenheit, Fahrenheit to Celsius …

 20 July 2019


UnitConversion.org – the universal assistant for all of your unit conversion needs.

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How to use the Temperature Units Converter

  1. Select the unit you want to convert from in the input unit list on the left.
  2. Select the unit you want to convert to in the output unit list on the right.
  3. Enter the value of the input unit to convert from in the input box on the left.
  4. The tool will immediately display the equivalent value of the output unit in the output box on the right.

Steps 1 to 3 may be executed in random order.

The value of your input unit can be converted to any other unit by just selecting a different output unit in the list on the right.

What you need to know about temperature units

Only 5 temperature scales are still in use today. In the past, however, many other scales were used. One by one, these scales fell into disuse and were replaced by modern scales with better characteristics. If you want a little more background about the origin of the temperature scales, both old and modern, then this article about temperature scales is made for you.

The Kelvin scale, invented by Lord Kelvin, is an absolute temperature scale that is used almost exclusively for scientific purposes. The zero point has been chosen at the lowest temperature possible. This is the point where the kinetic energy of all atoms is zero, which is the same as saying that they are not moving anymore. In other words, everything is frozen solid.
The size of the divisions on the Kelvin scale corresponds exactly to those on the Celsius scale. Negative temperatures do not appear on the Kelvin scale because scientists believe that absolute zero is the coldest possible temperature.
Kelvin is the base unit for temperature according to the International System of units.

The Celsius scale, created by Anders Celsius in 1742, is the most widely used scale on Earth. The scale is defined by the freezing and boiling point of water (at sea level), marked with 0°C and 100°C respectively. There are 100 divisions between these reference points, hence the name “centigrade scale” which is sometimes used when referring to this scale.

The Fahrenheit scale, an invention of Daniel Gabriel Fahrenheit, is, just like the Celsius scale, a relative temperature scale because the freezing and boiling point of water is chosen as the two fixed points on the scale. The freezing point is set to 32°F, while the boiling point is at 212°F (at sea level). There are 180 divisions between the two points which makes it a little bit more accurate. The scale is, however, only used in the United States, Belize, Liberia, and Myanmar.

The Rankine scale, developed by William John Macquorn Rankine, is an absolute scale only used in the scientific field of thermodynamics when formulas are expressed in Imperial Units. It starts at absolute zero and every division has the same size of a degree Fahrenheit. As with the Kelvin scale, negative numbers are impossible.

The Réaumur scale, made by René Antoine Ferchault de Réaumur, has only one reference point being the freezing point of water, which is set at 0°Ré. Water boils at 80°Ré. Today, this scale is still in use in some parts of the food industry, e.g. for cheese production or cooking sugar syrup.

Some remarkable temperatures

  °C °F K
Absolute zero -273.15 -459.67 0
Freezing point of water 0 32 273.15
Triple point of water 0.01 32.018 273.16
Human body temperature 37.0 98.6 310.15
Boiling point of water 100 212 373.15

Conversion formulas

Convert to Celsius
Fahrenheit (TF – 32) x 5/9
Kelvin TK – 273.15
Rankine (TRa – 491.67) x 5/9
Reaumur TRe x 5/4
Convert to Fahrenheit
Celsius (TC x 9/5) + 32
Kelvin (TK x 9/5) – 459.67
Rankine TRa – 459.67
Reaumur (TRe x 9/4) + 32
Convert to Kelvin
Celsius TC + 273.15
Fahrenheit (TF + 459.67) x 5/9
Rankine TRa x 5/9
Reaumur (TRe x 5/4) + 273.15
Convert to Rankine
Celsius (TC x 9/5) + 491.67
Fahrenheit TF + 459.67
Kelvin TK x 9/5
Reaumur (TRe x 5/4 – 273.15) x 9/5
Convert to Reaumur
Celsius TC x 4/5
Fahrenheit (TF – 32) x 4/9
Kelvin (TK – 273.15) x 4/5
Rankine (TRa x 5/9 + 273.15) x 4/5

Body temperature of humans compared to warm-blooded animals

Species °C °F
Elephant 36.5 97.7
Human 37.0 98.6
Horse 38.0 100.4
Baboon 38.1 100.6
Rabbit 38.3 101.0
Cow 38.6 101.5
Dog 38.9 102.0
Cat 39.0 102.2
Pig 39.0 102.2
Sheep 39.0 102.2
Goat 39.7 103.4
Duck 40.7 105.3
Camel* 34.5 – 41.0 94.1 – 105.8
Chicken 42.0 107.6
* The camel’s body temperature will vary with the time of day and water availability. When a camel is watered daily, its body temperature rises from 36.5°C (97.7°F) in the morning to 39.5°C (103.1°F) at noon, if the animal has no water, the temperature range is 34.5°C (94.1°F) to 41°C (105.8°F).

Fun facts about temperature



  1. rama says:

    I have read so many posts about the blogger lovers however this post is really a good piece of writing, keep it up

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