A yottabyte is 10^{24} or

1,000,000,000,000,000,000,000,000 bytes.

One yottabyte (abbreviated "YB") is equal to 1,000 zettabytes and is the largest SI unit of measurement used for measuring data. It is slightly smaller than its IEC-standardized counterpart, the yobibyte, which contains 1,208,925,819,614,629,174,706,176 bytes (2^{80}) bytes.

A single yottabyte contains one septillion, or one trillion times one trillion bytes, which is the same as one trillion terabytes. It is also a number larger than any human can comprehend. There is no need for a unit of measurement larger than a yottabyte because there is simply no practical use for such a large measurement. Even all the data in the world consists of just a few zettabytes.

**NOTE:** View a list of all the units of measurement used for measuring data storage.