GB to TB Converter
Useful when planning drive capacity, backups and cloud storage. Decimal units (1 TB = 1,000 GB).
1 GB = 0.001 TB
terabytes
1 GB = 0.001 TB
How to convert gigabytes to terabytes
Multiply the number of gigabytes by 0.001.
Formula
TB = GB × 0.001
Examples
- 256 GB × 0.001 = 0.256 TB
- 512 GB × 0.001 = 0.512 TB
- 4,000 GB × 0.001 = 4 TB
Gigabytes to terabytes conversion table
| Gigabytes (GB) | Terabytes (TB) |
|---|---|
| 1 | 0.001 |
| 64 | 0.064 |
| 100 | 0.1 |
| 128 | 0.128 |
| 250 | 0.25 |
| 256 | 0.256 |
| 500 | 0.5 |
| 512 | 0.512 |
| 750 | 0.75 |
| 1,000 | 1 |
| 1,024 | 1.024 |
| 2,000 | 2 |
| 4,000 | 4 |
| 5,000 | 5 |
| 8,000 | 8 |
| 10,000 | 10 |
Values rounded to 4 decimal places or 4 significant digits.
About gigabytes
A gigabyte (GB) is 1,000,000,000 bytes. Drive and phone manufacturers use this decimal gigabyte, while Windows reports sizes in binary units but labels them "GB". That is why a 1 TB drive shows up as about 931 GB.
About terabytes
A terabyte (TB) is 1,000,000,000,000 bytes, or 1,000 gigabytes. It is the usual unit for hard drive and SSD capacity.
Frequently asked questions
How many terabytes are in one gigabyte?
One gigabyte equals 0.001 terabytes.
How do I convert gigabytes to terabytes?
Multiply the number of gigabytes by 0.001. For example: 512 GB × 0.001 = 0.512 TB.
How many gigabytes are in one terabyte?
One terabyte equals 1,000 gigabytes.
Is the GB to TB conversion exact?
Yes. The factor follows directly from the official definitions of both units, so the only rounding is in how many decimals are displayed.