Updated: 03/05/2023 by Computer Hope
Terabyte in white lettering on a tablet screen.

A tbyte, terabyte, or TB equals 1,099,511,627,776 (240) bytes. However, the IEC (International Electrotechnical Commission) defines a TB equals 1,000,000,000,000 (1012) bytes. Therefore, a TB could be equal to either of these values.


When the "b" is lowercase (Tb), this refers to a terabit.

What comes before a terabyte?

A gigabyte comes before a terabyte.

What comes after a terabyte?

A petabyte comes after a terabyte.

Terabyte vs. other data measurements

Below is a listing of terabyte values where a terabyte is considered 1,000,000,000,000 (1012) bytes. Using this chart, you can find how many terabytes are in other measurements. For example, you can see 1,000 terabytes in a petabyte. For measurements that are smaller than a terabyte, the decimal value is shown.


See our (tebibyte) definition for a listing of gigabyte values where a terabyte equal s 1,099,511,627,776 (240) bytes.

TB (Terabyte) Value
Terabyte in a Bit (b) 0.000000000000125
Terabyte in a Nibble (N) 0.000000000001
Terabyte in a Byte (B) 0.000000000001
Terabyte in a Kilobit (Kb) 0.000000000125
Terabyte in a Kilobyte (KB) 0.000000001
Terabyte in a Kibibit (Kib) 1.279918085e-10
Terabyte in a Kibibyte (KiB) 1.02396068e-09
Terabyte in a Megabit (Mb) 0.000000125
Terabyte in a Megabyte (MB) 0.000001
Terabyte in a Mebibit (Mib) 1.310787783e-07
Terabyte in a Mebibyte (MiB) 1.048576348e-06
Terabyte in a Gigabit (Gb) 0.000125
Terabyte in a Gigabyte (GB) 0.001
Terabyte in a Gibibit (Gib) 0.0001342177388
Terabyte in a Gibibyte (GiB) 0.001073741334
Terabyte in a Terabit (Tb) 0.125
Terabyte in a Terabyte (TB) 1
Terabyte in a Tebibit (Tib) 0.137439
Terabyte in a Tebibyte (TiB) 1.09951
Terabytes in a Petabit (Pb) 125
Terabytes in a Petabyte (PB) 1,000
Terabytes in a Pebibit (Pib) 140.737
Terabytes in a Pebibyte (PiB) 1,125.9
Terabytes in an Exabit (Eb) 125,000
Terabytes in an Exabyte (EB) 1,000,000
Terabytes in an Exbibit (Eib) 144,115.188
Terabytes in an Exbibyte (EiB) 1,152,921.5
Terabytes in a Zettabyte (ZB) 1,000,000,000
Terabytes in a Yottabyte (YB) 1,000,000,000,000

Bit, Measurements, Storage device, Tebibit, Tera