# How to pronounce R² [duplicate]

How do I pronounce R² as seen in chemistry formulas or maths? I can pronounce it as "R-square" but what other word is there for "square"?

In this case, if 2 is above R, then it can be termed as:

Superior character or Superscript

Or if the 2 is below R, then it can be termed as :

Inferior character or Subscript.

• The OP asked how it's pronounced, not what the technical term for it is. – Erik Kowal May 18 '14 at 4:30
• @ErikKowal read his last sentence... "I can pronounce as R square but what other word for square?" – Invoker May 18 '14 at 4:43

Try "R squared", "R raised to the power two", or "R to the power of two".

In chemistry, the number is pronounced as usual. H2O2 is pronounced "H two O two".

In maths, it is different. You need to know what the function of the number is. 2 can be "two", or "squared" or other names.

In mathematics, a common short form of "R to the power of two" is "R to the two" (but not "R to two"). This expression is used for general powers (x^7, 2^6, e^x, etc.), whereas for powers 2 and 3 one usually uses "squared" and "cubed".