Convert terabytes to gigabytes
Enter a value in terabytes to convert it to gigabytes.
terabytes to gigabytes reference
| terabytes | gigabytes |
|---|---|
| 1 TB | 1000 GB |
| 2 TB | 2000 GB |
| 5 TB | 5000 GB |
| 10 TB | 10000 GB |
| 25 TB | 25000 GB |
| 50 TB | 50000 GB |
| 100 TB | 100000 GB |
The conversion factor
One terabyte is 1000 gigabytes. So to convert, multiply your figure in terabytes by 1000. To go the other way, multiply gigabytes by 0.001, or use the gigabytes to terabytes converter.
Doing it in your head
For a quick estimate, round the factor: roughly "times 1000". Use the exact converter above when the number matters.
Where this conversion comes up
Storage and download sizes, data caps, and the decimal-vs-binary gap that makes a “1 TB” drive show as about 931 GiB.
See the common unit conversions cheat sheet for the factors worth memorising.
Related tools
Frequently asked questions
How many gigabytes are in a terabyte?
1 terabyte = 1000 gigabytes.
What is the formula to convert terabytes to gigabytes?
Multiply the number of terabytes by 1000. To go back the other way, multiply gigabytes by 0.001.
What is 10 terabytes in gigabytes?
10 terabytes = 10000 gigabytes. The reference table below lists more common values.
Is this converter accurate?
It uses the internationally defined conversion factors and computes at full floating-point precision, then rounds only the displayed result. For everyday purposes it is exact; for legal, engineering or scientific work, confirm the required number of significant figures.
Does it work offline?
Yes. The conversion runs in your browser with no server call, so it keeps working with no connection, and nothing you enter is uploaded.
Last reviewed: September 2026. Figures and formulas are checked against their published sources; see the site's data notes.