It is one of the three best-known scales used to measure temperature, along with Fahrenheit and Celsius.
Like other temperature scale,
the freezing and boiling points of water are factors in establishing
the scale’s range. There are 100 degrees between the temperate at which
water freezes at (273.16 K) and boils (373.16 K).
Each unit on this scale, called a Kelvin rather than a degree, is equal to a degree on the Celsius scale.
For this reason, just the K, not the degree symbol, is used when
reporting temperatures in Kelvin. There are no negative numbers on the
Kelvin scale, as the lowest number is 0 K.