Temperature conversion calculator
The temperature conversion calculator simplifies the process of switching between Celsius, Fahrenheit, Kelvin, and Rankine scales. With predefined values and conversion formulas, it’s easy to convert temperatures accurately, making it a valuable resource for scientific, academic, and everyday applications.
By default, the Celsius field is set to 20 degrees Celsius, and the other fields are calculated based on this value. To convert a temperature from one unit to another, enter the temperature value in the input field for the unit you know. The other input fields will automatically update to show the corresponding temperature values in the other units.
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Temperature units
There are four commonly used temperature units: Celsius (°C), Fahrenheit (°F), Kelvin (K), and Rankine (°R). Each unit measures temperature differently and is used in different fields and countries.
- Celsius (°C): Celsius is the most widely used temperature scale and is based on the metric system. It was originally defined as the freezing point of water (0°C) and the boiling point of water (100°C) at standard atmospheric pressure. Celsius is commonly used in scientific and academic settings around the world, as well as in many countries for everyday purposes.
- Fahrenheit (°F): Fahrenheit is commonly used in the United States and some other countries, and is based on the imperial system. It was originally defined as the freezing point of a salt solution (0°F) and the human body temperature (96°F). Later, the boiling point of water was defined as 212°F.
- Kelvin (K): Kelvin is based on the International System of Units (SI), and is used in scientific and engineering applications. It is defined as the temperature at which all matter has zero entropy (the third law of thermodynamics). The Kelvin scale is similar to the Celsius scale in that 0 K is absolute zero (approximately -273.15°C), and the size of one Kelvin is the same as one Celsius degree.
- Rankine (°R): Rankine is an absolute temperature scale that is similar to Fahrenheit. It was defined as the temperature at which water boils (491.67°F) under standard atmospheric pressure. Rankine is primarily used in the United States and a few other countries, and is mainly used in engineering applications.
Conversion formulas
Below are the formulas for converting temperature measurements between the different scales:
Celsius to Fahrenheit:
\[F = (C \times 1.8) + 32\]
Fahrenheit to Celsius:
\[C = \frac{F – 32}{1.8}\]
Celsius to Kelvin:
\[K = C + 273.15\]
Kelvin to Celsius:
\[C = K – 273.15\]
Fahrenheit to Kelvin:
\[K = \frac{F + 459.67}{1.8}\]
Kelvin to Fahrenheit:
\[F = (K \times 1.8) – 459.67\]
Rankine to Kelvin:
\[K = \frac{R}{1.8}\]
Kelvin to Rankine:
\[R = K \times 1.8 \]
Note that in the conversion formulas, \(C\) represents the Celsius temperature, \(F\) represents the Fahrenheit temperature, \(K\) represents the Kelvin temperature, and \(R\) represents the Rankine temperature.