Terabytes to Gigabytes
Convert terabytes to gigabytes instantly — one terabyte is 1000 gigabytes.
| Terabytes | Gigabytes |
|---|---|
| 1 TB | 1000 GB |
| 2 TB | 2000 GB |
| 3 TB | 3000 GB |
| 5 TB | 5000 GB |
| 10 TB | 10000 GB |
| 25 TB | 25000 GB |
| 50 TB | 50000 GB |
| 100 TB | 100000 GB |
How to use
- Enter a value in the Terabytes field.
- The Gigabytes figure appears immediately — no button to press.
- Typing in the Gigabytes field converts back to Terabytes the same way.
- Use the reference table for the values that come up most often.
Terabytes to Gigabytes formula
Converting terabytes to gigabytes is a single multiplication by 1000.
GB = TB × 1000
Put another way, one terabyte is exactly 1,000 gigabytes.
Why this factor: the terabyte and the gigabyte are both defined against the byte, so dividing one definition by the other gives 1000 directly. Both definitions are set out in full below.
To go the other way, divide by 1000 — or use the Gigabytes to Terabytes converter, which is the same calculation reversed.
Worked example
Given 500 TB, multiplying by 1000 yields 500000 GB.
500 TB × 1000 = 500000 GB
The converter above does this for any value you type, in either direction.
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.
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.
Terabytes vs Gigabytes
The terabyte and the gigabyte 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 gigabytes are in a terabyte?
One terabyte equals 1000 gigabytes.
What is the formula to convert terabytes to gigabytes?
Multiply the number of terabytes by 1000. To reverse it, divide by 1000 instead.
How do I convert gigabytes back to terabytes?
Divide by 1000, which is the same as multiplying by 0.001.
How many gigabytes are in 10 terabytes?
10 TB works out to 10000 GB.
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 terabyte defined?
Exactly 1×10¹² bytes under SI prefixes. The binary tebibyte (TiB) is about 1.1×10¹² bytes.