Terabytes to tebibytes
Multiply terabytes by 0.909495 to get tebibytes.
10 TB = 9.0949 TiB
How to convert terabytes to tebibytes
The tebibyte is one binary terabyte, 1024⁴ bytes (2⁴⁰ B) — about 1.1 decimal terabytes. The terabyte is one trillion bytes (10¹² B) in the decimal convention.
Worked example — 10 TB: 10 × 0.909495 = 9.0949 TiB.
Terabytes to tebibytes table
| Terabytes | Tebibytes |
|---|---|
| 1 TB | 0.909495 TiB |
| 2 TB | 1.819 TiB |
| 4 TB | 3.638 TiB |
| 8 TB | 7.276 TiB |
| 10 TB | 9.0949 TiB |
| 12 TB | 10.9139 TiB |
| 16 TB | 14.5519 TiB |
| 20 TB | 18.1899 TiB |
| 100 TB | 90.9495 TiB |
Reverse and related
About terabytes and tebibytes
Terabyte (TB)
1 TB = 0.909495 TiBDefinition. One trillion bytes (10¹² B) in the decimal convention
History and origin
The terabyte, a trillion bytes, became an everyday size as hard drives grew through the 2000s. As with smaller units, the decimal value differs from the binary tebibyte.
Current use
Terabytes measure hard drives, large media libraries and backups.
Source: IEC 80000-13 (quantities and units — information science); NIST on binary prefixes
Tebibyte (TiB)
1 TiB = 1.0995 TBDefinition. One binary terabyte, 1024⁴ bytes (2⁴⁰ B) — about 1.1 decimal terabytes
History and origin
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.
Current use
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.
Source: IEC 80000-13 (quantities and units — information science); NIST on binary prefixes
Where people use this
Terabytes: hard drives, backups. Tebibytes: reported drive capacity, server and NAS storage. A 1 TB drive is about 0.91 TiB.
Every value is carried to full double precision; the display is rounded.
Both units are defined in IEC 80000-13 (quantities and units — information science); NIST on binary prefixes.
Questions people ask
What is the difference between TB and TiB?
A terabyte is 10¹² bytes (decimal); a tebibyte is 1024⁴ bytes, about 10% larger, so 1 TB is about 0.909 TiB.
How many TiB is 2 TB?
2 TB (decimal) is about 1.82 TiB.
Why does my 1 TB drive show less?
The OS reports binary tebibytes, so a 1 TB (decimal) drive appears as about 0.91 TiB.