Convert gigabytes to terabytes
Converting gigabytes to terabytes is a common data task, whether you are checking a recipe, a spec sheet, a travel distance or a homework problem. Since 1 GB equals 0.001 TB, the math is a single multiplication — and this page does it for you instantly, with the formula, a table of common values and answers to the questions people ask most.
Exact factor
How to convert gigabytes to terabytes
To convert gigabytes to terabytes, multiply the number of gigabytes by 0.001. For example, 10 GB × 0.001 = 0.01 TB.
TB = GB × 0.001
- Write down the value in gigabytes you want to convert.
- Multiply it by 0.001 (the exact GB→TB factor).
- The result is your value in terabytes. Check it below with the converter or the table.
Conversion table
Common values of gigabytes and their equivalents in terabytes:
| GB | TB |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 4 | 0.004 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
About these units
Gigabyte (GB). A gigabyte is 1,000 megabytes, roughly an hour of HD video or 250 songs. Smartphone storage, RAM and data plans are specified in gigabytes.
Terabyte (TB). A terabyte is 1,000 gigabytes, the capacity of modern hard drives and the scale of personal media libraries. About 250,000 photos fit in one terabyte.
Frequently asked questions
How do I convert gigabytes to terabytes?
To convert gigabytes to terabytes, multiply the number of gigabytes by 0.001. For example, 10 GB × 0.001 = 0.01 TB. Or skip the math: type the value into the converter at the top of this page and the result updates instantly.
How many terabytes are in 1 gigabyte?
1 GB = 0.001 TB. That is the fixed relationship used by this converter and by international standards.
How many gigabytes are in 1 terabyte?
1 TB = 1,000 GB. If you are converting in the opposite direction, use our Terabyte to Gigabyte converter for the dedicated table and FAQ.
Is the gigabytes to terabytes conversion exact?
Yes — this site uses decimal SI prefixes, so 1 KB = 1,000 bytes exactly. Note that some operating systems report file sizes in binary units (1 KiB = 1,024 bytes), which can make numbers differ slightly from storage labels.
What is gigabyte used for?
A gigabyte is 1,000 megabytes, roughly an hour of HD video or 250 songs. Smartphone storage, RAM and data plans are specified in gigabytes.