TB to GB Converter
Convert terabytes (TB) to gigabytes (GB) instantly. Type a value — the result updates as you type, and the swap button converts the other way.
TB to GB formula
GB = TB × 1000
1 terabyte = 1000 gigabytes · 1 gigabyte = 0.001 terabytes
To convert terabytes to gigabytes, multiply the value by 1000. For example, 1 TB:
GB = 1 × 1000GB = 1000
So 1 TB = 1000 GB.
Mental math shortcut
This conversion is exact, so there is no need to estimate: just multiply by 1,000.
TB to GB conversion table
GB back to TB
The same values converted the other way, rounded for everyday use:
| Gigabytes | Terabytes |
|---|---|
| 250 GB | 0.25 TB |
| 500 GB | 0.5 TB |
| 1000 GB | 1 TB |
| 2000 GB | 2 TB |
| 4000 GB | 4 TB |
| 8000 GB | 8 TB |
| 10000 GB | 10 TB |
| 16000 GB | 16 TB |
About the units
Terabytes (TB)
A terabyte is 1,000 gigabytes (one trillion bytes). Hard drives and SSDs are sold in decimal terabytes.
Gigabytes (GB)
A gigabyte is 1,000 megabytes (one billion bytes) as used by drive and phone makers. Windows reports sizes in gibibytes (1,024³ bytes), which is why a 1 TB drive shows about 931 “GB”.
Frequently asked questions
How many gigabytes are in a terabyte?
One terabyte equals 1000 gigabytes.
What is 1 TB in GB?
1 TB = 1000 GB.
How do I convert GB back to TB?
Divide the gigabytes by 1000. Or use the GB to TB converter.