Terabytes to gibibytes
Multiply terabytes by 931.3226 to get gibibytes.
10 TB = 9,313.2257 GiB
How to convert terabytes to gibibytes
The gibibyte is one binary gigabyte, 1024³ bytes (2³⁰ B) — what an OS often labels "GB". The terabyte is one trillion bytes (10¹² B) in the decimal convention.
Worked example — 10 TB: 10 × 931.3226 = 9,313.2257 GiB.
Terabytes to gibibytes table
| Terabytes | Gibibytes |
|---|---|
| 1 TB | 931.3226 GiB |
| 2 TB | 1,862.6451 GiB |
| 4 TB | 3,725.2903 GiB |
| 8 TB | 7,450.5806 GiB |
| 10 TB | 9,313.2257 GiB |
| 12 TB | 11,175.8709 GiB |
| 16 TB | 14,901.1612 GiB |
| 20 TB | 18,626.4515 GiB |
| 100 TB | 93,132.2575 GiB |
Reverse and related
About terabytes and gibibytes
Terabyte (TB)
1 TB = 931.3226 GiBDefinition. 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
Gibibyte (GiB)
1 GiB = 0.00107374 TBDefinition. One binary gigabyte, 1024³ bytes (2³⁰ B) — what an OS often labels "GB"
History and origin
The gibibyte was defined by the IEC in 1998 as the binary counterpart to the gigabyte, exactly 1024 to the third power bytes. It was introduced to end the confusion between decimal and binary sizes.
Current use
The gibibyte is what an operating system often shows when it labels a drive GB, which is why a 1 terabyte drive appears as about 931 gibibytes.
Source: IEC 80000-13 (quantities and units — information science); NIST on binary prefixes
Where people use this
Terabytes: hard drives, backups. Gibibytes: reported drive capacity, RAM. A 1 TB drive is about 931 GiB — why it shows "931 GB".
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
Why does my 1 TB drive show 931 GB?
The OS reports binary gibibytes: a 1 TB (decimal) drive is about 931 GiB, which it labels GB.
How many GiB is 2 TB?
2 TB is about 1862 GiB.
What is the difference between TB and TiB?
A terabyte is 1000 gigabytes; a tebibyte is 1024 gibibytes, about 10% larger.