The Kelvin scale starts at a true zero; 0o K is the temperature at which there is actually no heat. Therefore, you get a true measure of heat using this system; an object at twice the temperature in kelvins is actually twice as hot. That is not true of other temperature scales such as Celsius or Fahrenheit.
The Kelvin scale (apex)
Water freezes at 273.15 kelvin on the Kelvin temperature scale.
The Kelvin scale measures temperature. You can use it the same way you would use the Fahrenheit scale or the Celsius scale, but it also has an additional use. Since the Kelvin scale starts at the true zero of temperature, when there is no random thermal motion, rather than starting at some arbitrary point such as the freezing point of water (Celsius) or the coldest temperature that was obtainable in the laboratory at the time the Fahrenheit scale was first devised, you can make much more meaningful comparisons in Kelvin. If something has twice the temperature in Kelvin than something else has, then it actually is twice as hot. That is not true of other temperature scales. 20oC is not twice as hot as 10oC. But 20oK actually is twice as hot as 10oK.
Scientists use the Kelvin scale to measure temperature in scientific experiments and calculations. The Kelvin scale is based on absolute zero, the point at which all molecular movement ceases. By using the Kelvin scale, scientists can accurately measure temperature without negative values.
The temperature scale that places zero at the point where all atomic and molecular motion ceases is called the Kelvin scale. On the Kelvin scale, this point is defined as absolute zero, which is equivalent to 0 Kelvin (0K).
Kelvin
Celsius, kelvin, Fahrenheit
The Kelvin scale is an absolute temperature scale where 0K represents absolute zero. The absolute temperature scale refers to any temperature scale that starts at absolute zero, such as the Kelvin scale. So, the Kelvin scale is a specific type of absolute temperature scale.
The temperature scale that has no negative values is the Kelvin scale, because it has its zero point at the lowest possible measurable temperature (absolute zero).The similarly based scale using Fahrenheit intervals (degrees) is the Rankine scale. The Kelvin scale starts at (the minimum) absolute zero. (0 K = -273 oC)
The Kelvin scale (apex)
K (Kelvin)
The Kelvin temperature scale
The Calvin scale is a temperature scale in physics defined as the kelvin temperature shifted by 273.15 units, with its zero point at absolute zero. It is no longer in common use compared to the Celsius or Fahrenheit scales.
Water freezes at 273.15 kelvin on the Kelvin temperature scale.
Scientists commonly use the Celsius or Kelvin temperature scales.
Celsius, kelvin, Fahrenheit
the absolute temperature scale