1. How to convert GB to TB
The conversion is a single multiplication: TB = GB × 0.001. Both units are defined
against the same base — the byte (B) — so the factor is fixed and the result
is exact to the precision shown.
Worked at the two values people ask for most: 1 GB = 0.001 TB and
8 GB = 0.008 TB. Going the other way, GB = TB × 1,000, so
1 TB = 1,000 GB — a direction with its own page, TB to GB.
Results are given to eight significant figures. That is more precision than most jobs need — for a rough figure, use 1 GB = 0.001 TB and adjust — but rounding early and multiplying afterwards is how a small error becomes a visible one, so the full figure is what the converter carries.
2. Gigabytes to Terabytes conversion table
| Gigabytes (1000 MB) (GB) | Terabytes (1000 GB) (TB) |
|---|---|
| 1 GB | 0.001 TB |
| 2 GB | 0.002 TB |
| 4 GB | 0.004 TB |
| 8 GB | 0.008 TB |
| 16 GB | 0.016 TB |
| 32 GB | 0.032 TB |
| 64 GB | 0.064 TB |
| 100 GB | 0.1 TB |
| 128 GB | 0.128 TB |
| 256 GB | 0.256 TB |
| 512 GB | 0.512 TB |
| 1,000 GB | 1 TB |
| 1,024 GB | 1.024 TB |
Every row is the same factor applied — nothing in the table is a special case, and any value in between behaves the same way. Type your own figure into the converter above and the Formula tile shows the arithmetic being used, so the result is checkable rather than taken on trust.
3. What the two units are
- Gigabytes (1000 MB) (GB). One GB is 1,000,000,000 B.
- Terabytes (1000 GB) (TB). One TB is 1,000,000,000,000 B.
Both are converted through the byte (B): the value is multiplied by its own unit's factor to reach the base, then divided by the target unit's factor to leave it. No direct GB to TB factor has to exist or be kept correct, which is also why the converter can show the same value in all 11 data & storage units at once.
Two families of prefix share similar names. kB, MB, GB and TB are decimal — powers of 1,000, as SI requires and as drive manufacturers use. KiB, MiB, GiB and TiB are binary — powers of 1,024, standardised by IEC 80000-13, and what Windows means when it displays “GB”. The gap compounds: 2.4% at kilo, 4.9% at mega, 7.4% at giga and 10.0% at tera.
If the pair you actually want is not this one, the full unit converter runs every 11 data & storage units off the same factor table, along with 11 other categories of measurement.
4. Gigabytes to Terabytes FAQs
How do I convert GB to TB?
Multiply by 0.001. 1 GB = 0.001 TB, and 8 GB = 0.008 TB. The factor is exact to the precision shown, so the only rounding is the one you choose to do at the end.
How many TB is 1 GB?
1 GB = 0.001 TB. The full formula is TB = GB × 0.001, and 1 TB = 1,000 GB going the other way.
What is 8 GB in TB?
8 GB = 0.008 TB. The table above works the same factor through 13 values, and the converter takes any figure you type — including decimals.
How do I convert TB to GB?
GB = TB × 1,000, so 1 TB = 1,000 GB. Use the Swap button in the converter to reverse the direction without retyping the value, or open the dedicated TB to GB page.
Is a gigabyte 1,000 or 1,024 megabytes?
1,000. GB, MB and TB are decimal SI units; the binary powers of 1,024 are GiB, MiB and TiB under IEC 80000-13. Both families are in the converter, which is why a 1 TB drive is 0.909 TiB and shows as roughly 931 GB in a file manager that labels GiB as GB.
Is anything I type sent to a server?
No. The factor table ships with the page and every conversion runs in your browser. Nothing is uploaded, logged or written to storage, and the converter keeps working offline once the page has loaded.