How to convert terabytes to gigabytes
One terabyte equals 1,000 gigabytes. To convert, multiply the number of terabytes by 1,000:
Mental-math shortcut: Multiply terabytes by 1,000: 2 TB = 2,000 GB. Windows shows a 1 TB drive as about 931 GB because it counts in binary units.
Example
Convert 2 terabytes to gigabytes: 2 TB × 1,000 = 2,000 GB.
Terabytes to Gigabytes conversion chart
| Terabytes (TB) | Gigabytes (GB) |
|---|---|
| 0.5 | 500 |
| 1 | 1,000 |
| 2 | 2,000 |
| 3 | 3,000 |
| 4 | 4,000 |
| 5 | 5,000 |
| 6 | 6,000 |
| 8 | 8,000 |
| 10 | 10,000 |
| 12 | 12,000 |
| 16 | 16,000 |
| 20 | 20,000 |
What is a terabyte?
A terabyte (TB) is 1,000 gigabytes, or one trillion bytes. Hard drives, SSDs and cloud storage plans are sold in terabytes. Because Windows uses binary units, a 1 TB drive appears as about 931 GB (more precisely, 931 GiB) on a PC.
What is a gigabyte?
A gigabyte (GB) is 1,000 megabytes, or one billion bytes, in the decimal system that phone makers, drive makers and mobile carriers use. Windows counts a "gigabyte" as 1,024³ bytes (a gibibyte, GiB), which is why a 256 GB drive shows up as about 238 GB.
Converting the other way? Use the Gigabytes to Terabytes converter.
Frequently asked questions
How many gigabytes is one terabyte?
One terabyte is 1,000 gigabytes.
How do I convert terabytes to gigabytes?
Multiply the value in terabytes by 1,000. For example, 2 TB × 1,000 = 2,000 GB.
What is 1 TB in gigabytes?
1 TB is 1,000 gigabytes.
How do I convert gigabytes to terabytes?
Multiply gigabytes by 0.001 (or divide by 1,000). You can also use our Gigabytes to Terabytes converter.
Why does my 1 TB drive show only 931 GB?
The drive maker counts 1 TB as 1,000,000,000,000 bytes. Windows divides by 1,024³ instead of 1,000³, so it shows 931 GiB but labels it "GB". No space is missing.
Conversions use the internationally agreed definitions of each unit (for example, 1 inch = 2.54 cm exactly) and are rounded for display. Volume converters use US customary units unless stated otherwise.
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