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)
The Kelvin scale is an absolute temperature scale; 0 K corresponds to a thermodynamic temperature of absolute zero.
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.
Kelvin, that's why on the Kelvin temperature scale absolute zero is 0 Kelvin and 0 degrees centigrade is 273 Kelvin.
This is beacause it is in the absolute kelvin scale with -273 as the initial temperature. Also known as the absolute temperature.
Kelvin
Celsius, kelvin, Fahrenheit
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)
The Kelvin temperature scale
Scientists commonly use the Celsius or Kelvin temperature scales.
Use the Kelvin scale.
Celsius, kelvin, Fahrenheit
the absolute temperature scale
The Kelvin scale, usually, but chemistry and allied disciplines use Celsius sometimes.
The Kelvin scale of temperature is an absolute universale scale in SI; 0 kelvin is equal to -273,15 0C.
Because it is an absolute scale. There are no negative temperatures. With Kelvin, it makes sense to say that one temperature is twice another temperature, for example.