Gigabyte to Terabyte Converter (GB to TB)
1 gigabyte = 0.001 terabyte. With decimal prefixes 1 TB is 1,000 GB.
Result
500 GB = 0.5 TB
How to convert gigabyte to terabyte
With decimal prefixes 1 TB is 1,000 GB. Hard drives, SSDs and cloud storage plans are labelled in terabytes, while individual files and downloads are measured in gigabytes.
Formula
TB = GB × 0.001
Worked example
500 GB × 0.001 = 0.5 TB
Gigabyte to Terabyte quick-reference table
| Gigabyte (GB) | Terabyte (TB) |
|---|---|
| 128 GB | 0.128 TB |
| 256 GB | 0.256 TB |
| 500 GB | 0.5 TB |
| 1,000 GB | 1 TB |
| 2,000 GB | 2 TB |
| 4,000 GB | 4 TB |
Real-life examples
A 500 GB SSD is 0.5 TB, and a 1,000 GB cloud plan is 1 TB.
Frequently asked questions
How many GB are in a TB?
In SI units 1 TB is 1,000 GB. In the binary convention 1 TiB is 1,024 GiB.
How many GB does a 1 TB drive actually have?
It holds 1,000 GB as sold, which an operating system that uses binary units shows as about 931 GiB.
What is 1 gigabyte in terabyte?
1 gigabyte = 0.001 terabyte (GB to TB).
What is the formula to convert GB to TB?
TB = GB × 0.001. For example, 500 GB × 0.001 = 0.5 TB.
How do I convert TB back to GB?
Use the reverse converter: 1 terabyte = 1,000 gigabyte. Check: 0.5 TB converts back to 500 GB.
Reverse conversion
Need the other direction? Terabyte to Gigabyte converter (TB to GB): 1 terabyte = 1,000 gigabyte.
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