Temperature Conversion

Temperature Conversion - Unit Converter Online

Temperature Conversion

Temperature - Conversion

The temperature is one of the fundamental metric in the International System of Units (SI), which is a physical property of matter. The basic unit of temperature in the SI is the Kelvin (symbol "K"). Generally, temperature is measured with thermometers, which may be calibrated to a variety of temperature scales. For everyday applications, it usually uses the unit of Celsius scale. Temperature is really important, especially in all fields of natural science.

Temperature Conversion Calculator

1 Celsius = 33.8 Fahrenheit

Temperature Conversion Formula

FahrenheitCelsius°C = (°F - 32) / 1.8
FahrenheitKelvinK = (°F + 459.67) / 1.8
FahrenheitRankine°Ra = °F + 459.67
FahrenheitRéaumur °R= (°F - 32) / 2.25
CelsiusFahrenheit°F = ℃ × 1.8 + 32
CelsiusKelvinK = ℃ + 273.15
CelsiusRankine°Ra = ℃ × 1.8 + 32 + 459.67
CelsiusRéaumur°R =℃ × 0.8
KelvinCelsius℃ = K - 273.15
KelvinFahrenheit°F = K × 1.8 - 459.67
KelvinRankine°Ra = K × 1.8
KelvinRéaumur°R= (K - 273.15) × 0.8
RankineCelsius℃ = (°Ra - 32 - 459.67) / 1.8
RankineFahrenheit°F = °Ra - 459.67
RankineKelvinK = °Ra / 1.8
RankineRéaumur°R = (°Ra - 459.67 - 32) / 2.25
RéaumurCelsius℃ = °R × 1.25
RéaumurFahrenheit°F = °R × 2.25 + 32
RéaumurKelvinK = °R × 1.25 + 273.15
RéaumurRankine°Ra = °R × 2.25 + 32 + 459.67

Common temperature

Celsius (℃)Kelvin (K)Fahrenheit (°F)Rankine (°Ra)Réaumur (°R)Description
-273.150-459.670-218.52Absolute Zero
0273.1532491.670Freezing point
37310.1598.6558.6729.6Average body
100373.15212671.6780Boiling point

Most popular convertion pairs of temperature

Lastest Convert Queries


  1. Xion Feb 17, 2019 at 16:32 pm
    Which countries use Celsius as their primary temperature scale?
  2. Gulshan Feb 19, 2019 at 15:25 pm
    Hi Xion,

    The Celsius temperature scale is the most widely used in the world and is the primary temperature scale used in most countries, including: All European countries, including the United Kingdom, Canada, Australia, New Zealand, South Africa, China, India, Japan, South Korea, Mexico

    Fahrenheit is the primary temperature scale in the United States, although Celsius is also used in some scientific and medical applications.

  3. Zyad Nov 13, 2016 at 13:46 pm
    What is the relationship between temperature units and thermometers?
  4. Gulshan Nov 15, 2016 at 16:12 pm
    Hi Zyad,

    A thermometer works by detecting some physical property that varies with temperatures, such as the expansion of a liquid, the resistance of a metal wire, or the emission of radiation. The thermometer then converts this physical property into a numerical reading corresponding to a specific temperature unit, such as Celsius, Fahrenheit, or Kelvin.

    The choice of temperature unit a thermometer uses on the application and the user's preference. For example, in the United States, Fahrenheit temperature units are commonly used for standard temperature measurements. In contrast, Celsius temperature units are more widely used in scientific research and global temperature reporting. In engineering and industrial applications, Kelvin temperature units may be preferred due to their simplicity and consistency with other units of measurement.

  5. Veanna Sep 21, 2016 at 10:56 am
    What are some standard units of temperature measurement other than Celsius and Fahrenheit?
  6. Gulshan Sep 22, 2016 at 22:15 pm
    Hi Veanna,

    Several other units of temperature measurement are commonly used in various contexts. Some of the most common units of temperature measurement, other than Celsius and Fahrenheit, are:

    Kelvin (K) - Kelvin is an absolute temperature scale based on the theoretical minimum temperature at which all molecular motion ceases, known as absolute zero. On the Kelvin scale, 0 K is equivalent to -273.15°C.

    Rankine (°R) - Rankine is another absolute temperature scale, similar to Kelvin, but used mainly in engineering applications in the United States. On the Rankine scale, 0 °R equals absolute zero, and one degree Rankine equals one degree Fahrenheit.

    Réaumur (°Ré) - Réaumur is a temperature scale that was commonly used in Europe in the 18th and 19th centuries. On the Réaumur scale, the freezing point of water is 0 °Ré, and the boiling point is 80 °Ré. One degree Réaumur is equal to 1.25 degrees Celsius.

    Kelvin per second (K/s) - Kelvin per second is a temperature change rate commonly used in materials science and engineering to measure the heating or cooling rate of a material.

    Celsius per minute (°C/min) - Celsius per minute is another temperature change rate commonly used in industrial and scientific applications to measure the rate of temperature change over time.

  7. Sharma Jan 17, 2016 at 12:34 pm
    What are the differences between temperature and heat?
  8. Gulshan Jan 17, 2016 at 22:53 pm
    Temperature: The metric used to measure the heat content, but it is not energy itself. Its SI unit is kelvin. temperature is measured in Kelvin or Fahrenheit or degrees Celsius. our average body is 37 degrees celsius.

    Heat: Energy that is responsible for microscopic rapid motion of molecules. Its SI unit is joule.

    To understand the difference between temperature and heat, consider the example of a cup of hot coffee. The temperature of the coffee might be 80°C, but the heat energy of the coffee refers to the total amount of energy stored in the coffee, which is dependent on its temperature, volume, and mass. If you were to pour the coffee into a larger container with the same temperature, the temperature of the coffee would remain the same, but the amount of heat energy stored in the coffee would increase.

  9. Ragu Jun 17, 2015 at 21:56 pm
    Hi Gulshan. What is the SI unit of temperature?
  10. Gulshan Jun 19, 2015 at 08:11 am
    SI unit of Temperature is Kelvin.

    The temperature T in Kelvin (K) is equal to the temperature T in degrees Celsius (°C) plus 273.15, that conversion formula:

    T(K) = T(°C) + 273.15

    So melting point of ice is 0°C++ 273.15 = 273K and boiling point of water is 100°C+ 273.15 = 373 K.

  11. Marsh Mar 09, 2015 at 18:07 pm
    What is the difference between celsius and fahrenheit?
  12. Gulshan Mar 11, 2015 at 07:56 am
    Hi Marsh, There are two different units for measuring temperature. Most countries use degrees Celsius, the United States is the only major country that still uses Fahrenheit. Temperature is most commonly expressed using the Celsius or Kelvin scale in the European Union (EU).

    How to Calculate:

    Fahrenheit to Celsius : °C = (°F - 32) / 1.8

    Celsius to Fahrenheit : °F = ℃ × 1.8 + 32

  13. Asana Mar 03, 2015 at 12:21 pm
    What is the Fahrenheit equivalent of 40 degrees celsius?
  14. Gulshan Mar 04, 2015 at 07:21 am
    Conversion Formula: T (°F) = T (°C) × 9/5 + 32

    now , (40°C × 9/5) + 32 = 104°F

    use this converter: https://www.theunitconverter.com/celsius-to-fahrenheit-conversion/40-celsius-to-fahrenheit.html