How many degrees Celsius is T0?

Celsius temperature (symbol t). Where T0=273. 15K is the thermodynamic temperature of water freezing point, which is 0.0 1K (Kelvin) different from the thermodynamic temperature of water triple point. The unit of temperature is Celsius (symbol℃).

The current centigrade temperature has been incorporated into the international system of units, and the unit name "degree" has become invalid. In physics, the celsius temperature is expressed as t, the absolute temperature (kelvin) is expressed as t, and the celsius temperature is defined as t=T-T0. And T0, defined as 273. 15K, is a special name used by Kelvin to express the temperature of Celsius.

Basic introduction:

In the weather forecast program, except Beijing's "1 ~-6℃" is pronounced as "1 ~-6℃", others such as Shijiazhuang's "1 ~-5℃" are pronounced as "1 ~-5℃".

According to Article 3 of JJF1001-1998 "General Metrology Terms and Definitions", the definition of quantity is "generally a number multiplied by the size of a specific quantity represented by the unit of measurement". 1 is a number, not an order of magnitude, and -5℃ is an order of magnitude. Numbers cannot be equated with values.