How many bits comprise a unit of a Unicode?

Unicode is a computing industry standard for the consistent encoding, representation, and handling of text expressed in most of the world's writing systems.

Unicode characters are encoded using a variety of different schemes, but the most common is UTF-16, which uses 16 bits per character.

However, some characters may require more than 16 bits to encode, such as certain Chinese characters. In these cases, UTF-32 can be used, which uses 32 bits per character.

So, the answer to your question is that 16 bits is the most common number of bits used to comprise a unit of a Unicode character.