Absolute zero is the temperature at which a system is in the state of lowest possible (minimum) energy. As molecules approach this temperature their movements drop towards zero. It is the lowest temperature a gas thermometer can measure. No electronic devices work at this temperature.
Common temperatures in the absolute scale are:
- 0°C (freezing point of water) = 273.16K
- 25°C (room temperature) = 298.16K
- 100°C (boiling point of water) = 373.16K
- 0K (absolute zero) = -273.16°C
To convert from the Celsius scale into the absolute temperature, you add 273.16 and change °C to K. To get a temperature on the absolute scale to the Celsius scale, subtract 273.16 and change K to °C. This is normally used in the science world.
Celsius to Kelvin: K=C+273
Kelvin to Celsius : C=K-273