This temperature converter helps you exchange temperatures from one scale of measurement to another by using Celsius, Fahrenheit and the other units. You can read more about this subject below the form.

Please choose the temperature measurement scale and then enter the degrees number you want to convert.

## How does this temperature converter work?

We’ve all been thought to acknowledge temperatures in the international scales depending on the region we live and what is used there and it is not uncommon to be annoyed when you see the temperature in Fahrenheit for instance when you can only read it in Celsius.

For such situations you can now use the temperature converter to get your way through these scales as it gives the corresponding temperature in five different ways: Celsius (Centigrade, °C), Fahrenheit (°F), Kelvin (K), Rankine (°R) and Reaumur (°Ré). You only need to choose the measurement scale to begin with and enter any degree value to get the table of results.

## Example of a conversion result

In case you choose to transform from Celsius - 13.89°C to other units this tool will return the following:

■ Fahrenheit - 57.00°F;

■ Kelvin - 287.04K;

■ Rankine - 516.67°R;

■ Réaumur - 11.11°Ré.

## About temperature, measurement and scales

Temperature is a numerical value that represents the measure of hot or cold, the tendency of a substance or object to transfer heat.

It is determined by the detection of heat radiation, particle velocity or by the bulk behavior of a thermometric material. The fundamental temperature scale is the one of Kelvin that depends on the absolute zero point.

The Kelvin, unit of thermodynamic temperature, is the fraction 1/273.16 of the thermodynamic temperature of the triple point of water that is a theoretical point where the three phases of water come together.

Liquid, solid and gas phases appear at the same time at the triple point. It can be calibrated in any of the various temperature systems Celsius, Fahrenheit, Kelvin etc. Temperature scales differ in two ways, the point chosen as zero degrees and the magnitudes of incremental units (degrees) on the scale.

Galen was one of the first to try to establish a temperature scale, with a scale of 4 degrees warmth and 4 degrees of cold.

The early instrument was called thermo scope. The first closed thermo scope was invented by Ferdinand II Grand Duke of Toscany in 1642 when he put alcohol in the glass instrument.

In 1724 Gabriel Fahrenheit chose to introduce mercury in the thermo scope for its ability to largely expand and because it wouldn't stick to the glass and it was also easy to read. So Fahrenheit adapted a thermometer and a scale that is still in use in the United States.

The International System of Units (SI) defines a scale and unit for the thermodynamic temperature by using the reproducible temperature of the triple point of water as a second reference point, the first one being at 0 K. The triple point of water is fixed at 273,16 Kelvin Units.

## Present temperature scales have two basic points

■ the point where water starts to freeze;

■ the point where water starts to boil.

For everyday applications is more convenient to use the Celsius scale in which 0°C corresponds to the freezing point of water and 100°C to the boiling point at sea level.

A temperature difference of 1 degree Celsius is the same as a 1 Kelvin increment. This scale is used in most of the world (except for Belize, Myanmar, Liberia and the United States).

The Fahrenheit scale is defined so the melting point of water is at 32°F and the boiling point at 212°F. This means that between these two basic points are 180 divisions.

The Rankine scale is still used in engineering fields in the U.S. and is an absolute scale based on the Fahrenheit increment.

The Reaumur scale, also known as the octogesimal division is a temperature scale in which the freezing point is set at 0 degrees and the boiling point at 80 degrees.

## How to convert temperature from Fahrenheit to Celsius?

°C = (°F - 32) * 5/9

From the Fahrenheit figure you need to subtract 32 and then multiply by 5, then divide by 9 to get the Celsius Figure.

## How to convert temperature from Celsius to Fahrenheit?

°F = °C * 9/5 + 32

Multiply the Celsius figure by 9, divide by 5 and then add 32 to get the Fahrenheit figure.

## Temperature conversion table:

 from Celsius to Celsius Fahrenheit [°F]=[°C]x9/5+32 [°C]=([°F]-32)x5/9 Kelvin [K]=[°C]+273.15 [°C]=[K]-273.15 Rankine [°R]=([°C]+273.15)x9/5 [°C]=([°R]-491.67)x5/9 Reaumur [°Ré]=[°C]x4/5 [°C]=[°Ré]x5/4

## Few interesting temperature facts

■ The coldest theoretical temperature is called absolute zero. It is denoted by 0 K on the Kelvin temperature scale, -273.15°C on the Celsius scale and -459.67°F on the Fahrenheit scale;

■ The lower the pressure the lower is the temperature at which water boils;

■ Normal room temperature is approximately 72°F;

■ The average human body temperature is around 98.6°F;

■ Sponges hold more cold water than hot water;

■ When water freezes it expanses by 9% and hot water freezes quicker than cold water;

■ The average shower temperature is 101°F;

■ Mercury is the only metal that is liquid at room temperature.

23 Dec, 2014