Absolute scale is very convenient, because it does not contain negative nmbers. It is used in all quations in quantum mechanics, where temperature is included. Its degree (oK) has the same value as the degree in a usual Centigrade scale (oC). Correspondence between readings by Absolute temperature scale (T) and Centigrade scale (t) is defined by simple expressions T=t+273,15. Scale reading of absolute temperatures starts with the absolute zero.