How many zettabyte in 1 terabyte?
The answer is 1.09951162778E-9.

We assume you are converting between **zettabyte** and **terabyte**.

You can view more details on each measurement unit:

zettabyte or
terabyte

The main non-SI unit for **computer data storage** is the byte.

1 byte is equal to 1.0E-21 zettabyte, or 9.09494701773E-13 terabyte.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between zettabytes and terabytes.

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You can do the reverse unit conversion from terabyte to zettabyte, or enter any two units below:

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The SI prefix "zetta" represents a factor of
10^{21}, or in exponential notation, 1E21.

So 1 zettabyte = 10^{21} bytes.

The definition of a byte is as follows:

A byte is the basic unit of measurement of information storage in computer science. In many computer architectures it is a unit of memory addressing, consisting of 8 bits.

Since computer memory comes in base two rather than 10, a large portion of the software and computer industry use binary estimates of the SI-prefixed quantities, while producers of computer storage devices prefer the SI values. This is why a computer hard drive advertised with a "100 GB" decimal storage capacity actually contains no more than 93 GB of 8-bit (power of 2) addressable storage.

A terabyte (commonly abbreviated TB) is a measurement term for data storage capacity.

The number of bytes in a terabyte is sometimes stated to be approximately 1.0995 × 10^{12}. This difference arises from a conflict between the long standing tradition of using binary prefixes and base 2 in the computer world, and the more popular decimal (SI) standard adopted widely both within and outside of the computer industry. Standards organizations such as IEC, IEEE and ISO recommend to use the alternative term tebibyte (TiB) to signify the traditional measure of 1024^{4} bytes, or 1024 gibibytes.

The capacities of computer storage devices are typically advertised using their SI standard values, but the capacities reported by software operating systems uses the binary values. A NTFS formatted terabyte hard drive shows 931 gigabytes of free, usable storage space under Windows XP.

Most users prefer to calculate unit conversions using the binary definition, so this site uses non-SI units.

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