Tebibyte (TiB)

Definition

One binary terabyte, 1024⁴ bytes (2⁴⁰ B) — about 1.1 decimal terabytes.

History

The tebibyte is the IEC binary counterpart to the terabyte, exactly 1024⁴ bytes, defined in 1998. It is about 10% larger than a decimal terabyte.

Where it is used

The tebibyte is how operating systems and NAS devices report large capacities, which is why a 1 TB drive shows as about 0.91 TiB.

Typical uses include reported drive capacity, server and NAS storage.

Conversion pages

These pages convert tebibyte to or from another unit in digital storage.

No conversion pages use this unit yet.

Other Digital storage units

• Byte (B)
• Bit (bit)
• Kilobyte (kB)
• Megabyte (MB)
• Gigabyte (GB)
• Terabyte (TB)
• Gibibyte (GiB)
• Mebibyte (MiB)

Sources

• IEC 80000-13 IEC 80000-13 (quantities and units — information science); NIST on binary prefixes · Dataset reviewed Nov 11, 2026