Introduction to temperature – including Celsius, Fahrenheit, Kelvin and Rankine definitions – an online temperature converter
Temperature (sometimes called thermodynamic temperature) is a measure of the average kinetic energy of the particles in a system. Temperature is the degree of “hotness ” ( or “coldness “) – a measure of the heat intensity .
When two objects of different temperatures are in contact – the warmer object becomes colder while the colder object becomes warmer. This means that heat flows from the warmer to the colder object.
Convert between o C (Celsius), o F (Fahrenheit), K (Kelvin) and oR (Rankine) with the calculator below:
Temperature Converter – Web App
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Degree Celsius ( o C ) and Degree Fahrenheit ( o F )
A thermometer can help us determine how cold or hot a substance is. Temperature is in most of the world measured and reported in degrees Celsius ( o C). In the U.S. it is common to report temperature in degrees Fahrenheit ( o F). In the Celsius and Fahrenheit scales the temperatures where ice melts (water freezes) and water boils are used as reference points.
- In the Celsius scale the freezing point of water is defined as 0 o C and the boiling point is defined as 100 o C
- In the Fahrenheit scale the water freezes at 32 o F and boils at 212 o F
In the Celsius scale there are 100 degrees between the freezing point and the boiling point of water compared to 180 degrees in the Fahrenheit scale. This means that 1 o C = 1.8 o F (check the section about temperature differences below).
Values can be converted between the two temperature units by using the equations:
In the English system the absolute temperature is in degrees Rankine (R ). not in Fahrenheit:
- Basics – The SI-system, unit converters, physical constants, drawing scales and more
- Temperature Measurement – Measurement of temperature – probes, sensors and transmitters
- Thermodynamics – Effects of work, heat and energy on systems
- Ideal Gas Law – The relations between volume, pressure, temperature and quantity of a gas, including definition of density of a gas.
- Pt100 – Platinum Resistance Thermometers – Pt100 electrical resistance – ranging -220 to 750 degrees Celsius
- International Standard Atmosphere – International standard atmosphere in elevation -2000 to 30000 meters – pressure, temperature, density, viscosity, thermal conductivity and velocity of sound
- Temperature Sensors – Comparing Types – Comparing advantages and disadvantages of thermocouples, RTDs and thermistors temperature sensors
- Universal and Individual Gas Constants – The Universal and Individual Gas Constants in fluid mechanics and thermodynamics
- Thermal Conductivity of Metals – Thermal conductivity of some common metals
- Globe Temperature – Resultant or globe temperature
- Survival Time in Cold Water – Time to exhaustion and death in cold water
- Boiling Points for common Liquids and Gases – Boiling points of some common liquids and gases – acetone, butane, propane.
- Arithmetic and Logarithmic Mean Temperature Difference – Arithmetic Mean Temperature Difference – AMTD – and Logarithmic Mean Temperature Difference – LMTD – formulas with examples – Online Mean Temperature Calculator
- Thermocouples – Thermocouples – types, principles and temperature ranges
- RTD – Resistance Temperature Detector – Thermal resistive sensor – a basic introduction
- Non-ideal gas – Van der Waals equation and constants – Listing of van der Waals constants for more than 200 gases, used to correct for non-ideal behavior of gases caused by intermolecular forces and the volume occupied by the gas particles
- Rankine Efficiency – The efficiency of the Rankine cycle
- en: temperature celsius fahrenheit kelvin
- es: temperatura Fahrenheit Centígrados Kelvin
- de: Temperatur Celsius Fahrenheit Kelvin
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