Gigabytes to terabytes
Multiply gigabytes by 0.001 to get terabytes.
2,000 GB = 2 TB
How to convert gigabytes to terabytes
The terabyte is one trillion bytes (10¹² B) in the decimal convention. The gigabyte is one billion bytes (10⁹ B) in the decimal convention.
Worked example — 2,000 GB: 2,000 × 0.001 = 2 TB.
Gigabytes to terabytes table
| Gigabytes | Terabytes |
|---|---|
| 100 GB | 0.1 TB |
| 250 GB | 0.25 TB |
| 500 GB | 0.5 TB |
| 1,000 GB | 1 TB |
| 2,000 GB | 2 TB |
| 4,000 GB | 4 TB |
| 8,000 GB | 8 TB |
| 16,000 GB | 16 TB |
| 32,000 GB | 32 TB |
Reverse and related
About gigabytes and terabytes
Gigabyte (GB)
1 GB = 0.001 TBDefinition. One billion bytes (10⁹ B) in the decimal convention
History and origin
The gigabyte uses the metric giga prefix for a billion bytes. Drive makers label capacity in decimal gigabytes, while operating systems often report the binary gibibyte, which is why sizes seem to disagree.
Current use
Gigabytes measure phone storage, memory and mobile data plans.
Source: IEC 80000-13 (quantities and units — information science); NIST on binary prefixes
Terabyte (TB)
1 TB = 1,000 GBDefinition. 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
Where people use this
Gigabytes: phone storage, mobile data plans. Terabytes: hard drives, backups. 1000 GB is 1 TB.
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
How many GB in a TB?
One terabyte is 1000 gigabytes in the decimal convention. To convert TB to GB, multiply by 1000.
How many GB is 2 TB?
2 TB is 2000 GB, and 4 TB is 4000 GB.
How many GB is half a TB?
Half a terabyte is 500 GB.
Why does a 1 TB drive show less than 1000 GB?
Operating systems report binary units, so a 1 TB decimal drive shows as about 931 GiB, which it labels GB.