# Online Temperature Converter

Online Web Code Test |
Online Image Picker |
Online Color Picker

# Temperature Converter

Please enter a number:

This temperature converter can convert between different temperature units, you just need to enter a original value and select the original unit in combobox, converter will quickly calculate all the values of other temperature units.

This tool calculates equivalent temperature values across several commonly used temperature scales. The Kelvin and Rankine scales are absolute versions of the Celsius and Fahrenheit scales, respectively, meaning that the zero points on these scales reflect a theoretical minimum temperature. In contrast, the zero points on the Celsius and Fahrenheit scales were originally based on observable physical phenomena, such as the freezing point of water.

# Calculator Use

Temperature conversions are performed by using a formula, which differs depending on the two temperature scales you are converting between.

For example, to convert 50 degrees Celsius (centigrade) to Fahrenheit, we plug our numbers into the formula as shown below: F = C * 9/5 + 32

F = 50 * 9/5 + 32

F = 90 + 32

F = 122

50 degrees Celsius is equal to 122 degrees Fahrenheit.

# Temperature Conversion Calculator

emperature Conversion Calculator is an online heat measurement tool in unit conversion programmed to calculate the equivalent temperature in Celsius, Fahrenheit and Kelvin for any given input value of temperature. Celsius, Fahrenheit and Kelvin are the scales used to measure the temperature. Degree Celcius, Degree Fahrenheit and Kelvin are the temperature measurement units refers to Celsius scale, Fahrenheit scale and Kelvin scale respectively. Unlike other two measurement units, Kelvin is an absolute thermodynamic scale doesn't have any typeset degree. This Temperature converter use all these scales to generate output in any temperature units for the respective input temperature value that you can convert any temperature from Kelvin to Celsius and Fahrenheit or celcius to Fahrenheit and Kelvin or Fahrenheit to Celsius and Kelvin.

# History of measuring temperature:

The idea of measuring temperature exists a long time. One of the first who wanted to make a temperature scale was Galen (ca. 170). He had a scale of 4 degrees warmth and 4 degrees of cold. The earlier measurement instruments for temperature where called thermo scopes. In 1610 Galileo introduced wine in the thermo scopes instead of air. In 1724 Gabriel Fahrenheit introduced the medium mercury in the thermo scopes. The reason that mercury was used is that the thermal expansion of mercury is large, mostly homogeneous and it does not stick on the glass. Mercury also stays in the liquid phase for a great range of temperature. It is also easy to read.

# Present temperature scales:

Present temperature scales have two basic points: from when the water starts to freeze and when it starts to boil. Between these two temperatures a scale is made. The two most popular scales are the Celsius (made by Anders Celsius) and Fahrenheit (made by Gabriel Fahrenheit) scale. The Fahrenheit scale is defined so that the melting point of water lays by 32 degrees Fahrenheit and the boiling point lays by 212 degrees Fahrenheit. This means that between the freezing point and boiling point there are 180 divisions. Fahrenheit introduced his scale in 1724.

Another scale is the Celsius scale. In the Celsius scale the freezing point of water is set at 0 degrees (centigrade) and the boiling point at 100 degrees (centigrade). This scale exists on 100 divisions, also known as centiscale. In 1948 the centidegrees (centigrade scale) were replaced by the degrees Celsius (oC).

This conversion tool will convert a temperature value from and to degC, degF or Kelvin measurement units. This tool will also display a conversion scale applicable to each converted temperature.

It is always hard to come up with a good definition for everyday terms, but with temperature, it is notoriously difficult. We all know what is hot or cold, but temperature? Temperature is much harder to define without getting technical, which is precisely why we will get technical. To do this we have to turn to physics, in particular to thermodynamics and statistical physics, which is like thermodynamics meets quantum physics.

There is no need to worry, however, because when we dig deeper into what is temperature, the answer is fairly simple: temperature is speed, or rather the momentum of the atoms and molecules that make up a material. What this means is that the higher the temperature of something, the higher the particles velocity; a.k.a.the molecules that make up that something vibrate faster. This is very closely related to the concept of thermal energy and means that heat is just another expression of kinetic energy.

The lowest possible temperature is zero Kelvin (K), -273.15 degC or -459.67 degF and this is called absolute zero. This converter will not convert values which are lower than absolute zero.

1. Enter the temperature reading you would like to convert in the upper input box.

2. Select the corresponding units from the upper selection list for the entered temperature above.

3. Select the temperature units from the lower selection list that you would like to use for the conversion.

4. The converted temperature will display in the lower text box.

#### Conversion Formulas

The following formulas are used by this temperature converting tool:

#### Celsius

°C = (°F - 32) x 5/9

°C = K - 273.15

#### Fahrenheit

°F = (°C x 9/5) + 32

°F = ((K - 273.15) x 9/5) + 32

#### Kelvin

K = °C + 273.15

K = ((°F - 32) x 5/9) + 273.15

Temperature conversions are performed by using a formula, which differs depending on the two temperature scales you are converting between.

For example, to convert 50 degrees Celsius (centigrade) to Fahrenheit, we plug our numbers into the formula as shown below: F = C * 9/5 + 32

F = 50 * 9/5 + 32

F = 90 + 32

F = 122

50 degrees Celsius is equal to 122 degrees Fahrenheit.

#### What is temperature?

Temperature is an intensive quantity and describes the energy state of the matter. All materials have atoms and molecules that are constantly moving, vibrating or rotating. The temperature of an object can be defined by the average kinetic energy of its atoms and molecules.

#### Kelvin (K)

Kelvin is the base unit of temperature in the SI system (International System of Units). Kelvin unit’s abbreviation is K (no degree or degree sign). Kelvin unit was first presented by William Thomson (Lord Kelvin) in 1848. Kelvin is currently defined as the fraction 1/273.16 of the thermodynamic temperature of the triple point of water, absolute zero point being 0 K.

#### Celsius (°C)

Celsius is currently a derived unit for temperature in the SI system, Kelvin being the base unit. The unit and the actual Celsius scale was first presented by a Swede Anders Celsius in 1742. The two main reference points of the Celsius scale were the freezing point of water (or melting point of ice) being defined as 0 °C and the boiling point of water being 100 °C.

#### Fahrenheit (°F)

Fahrenheit scale was first introduced by a Dutch Gabriel Fahrenheit in 1724. The two main reference points of the scale are the freezing point of water being specified as 32°F and the temperature of human body being 96°F. Nowadays the Fahrenheit scale is redefined in a way that the melting point of ice is exactly 32 °F and the boiling point of water exactly 212 °F. The temperature of the human body is about 98 °F on the revised scale.

#### Rankine (°R, °Ra)

Rankine scale was presented by a Scottish William Rankine in 1859. The reference point of Rankine scale is absolute zero point being 0 °Ra, like in Kelvin scale. One Rankine degree is the same size as one Fahrenheit degree. So the freezing point of water equals 491.67 °Ra.

#### Réaumur (°Ré, °Re)

Réaumur scales was introduced by Réne de Réaumur in 1730. It has the reference points being the freezing points of water 0 °Re and boiling point of water being 80 °Re.