Yes: the kelvin is a metric unit of measurement! However, it's not a multiple or a submultiple of the celsius, the other metric unit for temperature: between the two scales, there is only an offset.
We say that the kelvin is an absolute scale of temperature, with zero corresponding to the absolute zero (the temperature at which thermal noises go to zero). Since the absolute zero lies at -273.15 °C, this is also the temperature offset between the scales:
T [°C] = T [K] + 273.15 Read more