GB to TB Converter
Convert gigabytes (GB) to terabytes (TB) instantly. Type a value — the result updates as you type, and the swap button converts the other way.
GB to TB formula
TB = GB ÷ 1000
1 gigabyte = 0.001 terabytes · 1 terabyte = 1000 gigabytes
To convert gigabytes to terabytes, divide the value by 1000. For example, 500 GB:
TB = 500 ÷ 1000TB = 0.5
So 500 GB = 0.5 TB.
Mental math shortcut
This conversion is exact, so there is no need to estimate: just divide by 1,000.
GB to TB conversion table
TB back to GB
The same values converted the other way, rounded for everyday use:
| Terabytes | Gigabytes |
|---|---|
| 0.128 TB | 128 GB |
| 0.256 TB | 256 GB |
| 0.5 TB | 500 GB |
| 0.512 TB | 512 GB |
| 1 TB | 1000 GB |
| 2 TB | 2000 GB |
| 4 TB | 4000 GB |
| 8 TB | 8000 GB |
About the units
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”.
Terabytes (TB)
A terabyte is 1,000 gigabytes (one trillion bytes). Hard drives and SSDs are sold in decimal terabytes.
Frequently asked questions
How many terabytes are in a gigabyte?
One gigabyte equals 0.001 terabytes.
What is 500 GB in TB?
500 GB = 0.5 TB.
How do I convert TB back to GB?
Multiply the terabytes by 1000. Or use the TB to GB converter.