The absolute scale  temperature or Kelvin scale of temperature was suggested by Lord Kelvin. The Kelvin scale has ice point at  $273K$ and steam point at $373K$. Thus, any temperature ($t^{o}C$) on the Kelvin scale is given by $T=(t+273)K$.

Celsius or Fahrenheit scale may have positive or negative values. But a Kelvin scale will have only positive values on the temperature scale.