How many megabytes does a CD hold?


Quick Answer

A compact disc's information capacity is between 650 and 700 megabytes. Typically, approximately 50 megabytes are used for the purposes of file structure and indexing.

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Full Answer

Audio compact discs, which feature uncompressed digital audio files, take up more space than compressed audio files like the popular MP3 format. There is a maximum of 74 minutes of music on an audio CD. As a general rule, one minute of a compressed audio file is approximately equal to 1 megabyte of data. Thus, a 700-megabyte CD can hold close to 700 minutes of compressed music files.

The storage capacity of a CD is divided into minutes, seconds and sectors. There are 75 sectors per second, 60 seconds per minute and 74 minutes per disc on high-capacity types.

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