An Absolute Temperature Calculator is a tool used to convert temperatures from different scales (Celsius or Fahrenheit) to the Kelvin scale. Kelvin is the base unit of temperature in the International System of Units (SI) and is essential for scientific calculations because it starts at absolute zero, the point at which molecular motion stops.
Formula of Absolute Temperature Calculator
To convert a given temperature to its absolute temperature in Kelvin, you can use the following formulas based on the input temperature scale:
Celsius to Kelvin: T(K) = T(°C) + 273.15
Fahrenheit to Kelvin: T(K) = (T(°F) + 459.67) / 1.8
Where:
- T(K) is the temperature in Kelvin
- T(°C) is the temperature in degrees Celsius
- T(°F) is the temperature in degrees Fahrenheit
General Terms and Quick Reference Table
Here are some common temperature conversions to Kelvin for quick reference:
| Temperature (°C) | Temperature (°F) | Temperature (K) |
|---|---|---|
| -273.15 | -459.67 | 0 |
| 0 | 32 | 273.15 |
| 25 | 77 | 298.15 |
| 100 | 212 | 373.15 |
| -40 | -40 | 233.15 |
Example of Absolute Temperature Calculator
Let’s convert 25 degrees Celsius and 77 degrees Fahrenheit to Kelvin:
For Celsius to Kelvin: Given T(°C) = 25: T(K) = 25 + 273.15 = 298.15 So, 25 degrees Celsius is 298.15 Kelvin.
For Fahrenheit to Kelvin: Given T(°F) = 77: T(K) = (77 + 459.67) / 1.8 = 298.15 So, 77 degrees Fahrenheit is also 298.15 Kelvin.
Most Common FAQs
Kelvin is used in scientific calculations because it is an absolute temperature scale that starts at absolute zero, the point at which all molecular motion stops. This makes it ideal for thermodynamic calculations.
Kelvin differs from Celsius and Fahrenheit as it starts from absolute zero, the lowest possible temperature, whereas Celsius and Fahrenheit are relative scales starting from the freezing point of water and an arbitrary zero point, respectively.
No, temperatures in Kelvin cannot be negative because Kelvin starts at absolute zero, which is the lowest possible temperature where no thermal energy exists.