²
Symbol  Format  Data 

²  Code Point 
U+00B2 
TeX 
^2 

SVG 
The ‘²’ (superscript two) symbol is used in mathematics to denote the square of a number or variable. It also represents the second derivative in calculus when used as a notation for differentiation. For example:
This signifies that the variable x is raised to the power of 2, which means x is multiplied by itself.
The superscript one, ¹, is used in mathematics to denote the power of a number or variable.
The superscript three, ³, is used in mathematics to denote the cube of a number or variable.