Gigabytes to Terabytes
Type a value in either box to convert between gigabytes and terabytes. The factor is 0.001.
| Gigabytes | Terabytes |
|---|---|
| 1 GB | 0.001 TB |
| 2 GB | 0.002 TB |
| 3 GB | 0.003 TB |
| 5 GB | 0.005 TB |
| 10 GB | 0.01 TB |
| 25 GB | 0.025 TB |
| 50 GB | 0.05 TB |
| 100 GB | 0.1 TB |
How to use
- Enter a value in the Gigabytes field.
- The Terabytes figure appears immediately — no button to press.
- Typing in the Terabytes field converts back to Gigabytes the same way.
- Use the reference table for the values that come up most often.
Gigabytes to Terabytes formula
Converting gigabytes to terabytes is a single multiplication by 0.001.
TB = GB × 0.001
Put another way, one gigabyte is exactly 1/1,000 of a terabyte.
Why this factor: the gigabyte and the terabyte are both defined against the byte, so dividing one definition by the other gives 0.001 directly. Both definitions are set out in full below.
To go the other way, divide by 0.001 — or use the Terabytes to Gigabytes converter, which is the same calculation reversed.
Worked example
Given 500 GB, multiplying by 0.001 yields 0.5 TB.
500 GB × 0.001 = 0.5 TB
The converter above does this for any value you type, in either direction.
What is a gigabyte?
A gigabyte is one billion bytes — the everyday unit of storage and memory capacity.
Definition: Exactly 1,000,000,000 bytes under SI prefixes. The binary gibibyte (GiB) is 1,073,741,824 bytes.
Where it is used: Phone and laptop storage, RAM capacity, video file sizes, and cloud storage plans.
What is a terabyte?
A terabyte is one trillion bytes, the standard capacity unit for hard drives and large archives.
Definition: Exactly 1×10¹² bytes under SI prefixes. The binary tebibyte (TiB) is about 1.1×10¹² bytes.
Where it is used: Hard drive and SSD capacity, backup archives, and database sizes.
Worth knowing: A 1 TB drive reports as roughly 931 GiB in an operating system that counts in powers of two — the storage is not missing, just labelled differently.
Gigabytes vs Terabytes
The gigabyte and the terabyte belong to the same family of units, so converting between them is usually a matter of shifting a decimal point or applying a small whole-number factor.
Frequently asked questions
How many terabytes are in a gigabyte?
One gigabyte equals 0.001 terabytes.
What is the formula to convert gigabytes to terabytes?
Multiply the number of gigabytes by 0.001. To reverse it, divide by 0.001 instead.
How do I convert terabytes back to gigabytes?
Divide by 0.001, which is the same as multiplying by 1000.
How many terabytes are in 10 gigabytes?
10 GB works out to 0.01 TB.
Is there anything to watch out for with terabytes?
A 1 TB drive reports as roughly 931 GiB in an operating system that counts in powers of two — the storage is not missing, just labelled differently.
How is the gigabyte defined?
Exactly 1,000,000,000 bytes under SI prefixes. The binary gibibyte (GiB) is 1,073,741,824 bytes.