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Terabytes to tebibytes (TB to TiB)

To convert terabytes to tebibytes (TB to TiB): one terabyte is 0.9094947 tebibytes, so 12 TB is 10.9139 TiB.

Swap units: TiB to TB

In tebibytes10.9139 TiB

Conversion factor Exact by definition: the decimal prefixes (kB, MB, GB, TB) step by exactly 1,000 and the binary ones (KiB, MiB, GiB, TiB) by exactly 1,024.
1 terabyte = 0.9094947018 tebibytes
The other way
1 tebibyte = 1.099511628 terabytes
Working
12 x 0.9094947018 = 10.9139
12 TB in every unit
1.2000e13 B 1.2000e10 kB 12,000,000 MB 12,000 GB 12 TB 0.012 PB 1.1719e10 KiB 11,444,092 MiB 11,176 GiB 10.914 TiB 0.010658 PiB
Decimal vs binary prefixes Drive manufacturers use the decimal GB and operating systems traditionally reported the binary one, which is why a 1 TB drive shows as 931 GB. Both numbers are correct; they are different units.
1 GB = 1,000,000,000 bytes; 1 GiB = 1,073,741,824
terabytes to tebibytes
TBTiB
10.909495
21.81899
54.54747
109.09495
2522.7374
5045.4747
10090.9495

How the Unit Converter works

One terabyte is exactly 0.9094947018 tebibytes. That is the definition of the prefixes, not a measurement: the decimal SI prefixes (kilo, mega, giga, tera) step by exactly 1,000, and the binary IEC prefixes (kibi, mebi, gibi, tebi) step by exactly 1,024. The two families are both exact; the trouble is only that software and storage labels do not always say which one they mean.

Worked through: 8 TB x 0.909494702 = 7.27596 TiB.

Going the other way, one tebibyte is 1.099511628 terabytes.

For mental arithmetic: Multiply by 0.909, or subtract 9%.

This is the conversion behind the most frequently asked question in computing: why does a 1 TB drive show up as 931 GB? Because the manufacturer sold 10^12 bytes and the operating system is dividing by 1,024 four times, which gives 0.9095 TiB, displayed as 931 GB because it is also mislabeling the unit. Nothing is missing and nobody is lying; two different unit systems are being printed with one set of names. The gap widens as drives grow: 2.4% at kilobytes, 7.4% at gigabytes, 9.1% at terabytes.

Precision is worth matching to the input. A measurement given as 1 TB carries one or two significant figures, and reporting its conversion to six implies a precision the original never had.

Unit Converter FAQ

How many tebibytes are in a terabyte?

0.9094947. That is exact by definition: the prefixes step by exactly 1,000 (SI) or 1,024 (IEC).

What is 12 TB in tebibytes?

10.9139 TiB. Multiply by 0.9094947: 8 TB x 0.909494702 = 7.27596 TiB.

How do I convert tebibytes back to terabytes?

Divide by 0.9094947, or equivalently multiply by 1.0995116. One tebibyte is 1.0995116 terabytes. The two factors are reciprocals, so you only need to remember one of them.

Is there a quick way to do this in my head?

Multiply by 0.909, or subtract 9%. It is close enough for everyday use.

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