Terabytes to Gigabits
Type a value in either box to convert between terabytes and gigabits. The factor is 8000.
| Terabytes | Gigabits |
|---|---|
| 1 TB | 8000 Gb |
| 2 TB | 16000 Gb |
| 3 TB | 24000 Gb |
| 5 TB | 40000 Gb |
| 10 TB | 80000 Gb |
| 25 TB | 200000 Gb |
| 50 TB | 400000 Gb |
| 100 TB | 800000 Gb |
How to use
- Enter a value in the Terabytes field.
- The Gigabits figure appears immediately — no button to press.
- Typing in the Gigabits field converts back to Terabytes the same way.
- Use the reference table for the values that come up most often.
Terabytes to Gigabits formula
The factor from terabytes to gigabits is 8000.
Gb = TB × 8000
Put another way, one terabyte is exactly 8,000 gigabits.
Why this factor: the terabyte and the gigabit are both defined against the byte, so dividing one definition by the other gives 8000 directly. Both definitions are set out in full below.
To go the other way, divide by 8000 — or use the Gigabits to Terabytes converter, which is the same calculation reversed.
Worked example
Start with 4 TB. Multiply by 8000 to get 32000 Gb.
4 TB × 8000 = 32000 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 gigabit?
A gigabit is one billion bits, the unit of modern high-speed networking.
Definition: Exactly 1,000,000,000 bits, so exactly 125,000,000 bytes.
Where it is used: Gigabit Ethernet, fiber broadband tiers, and data-centre interconnects.
Terabytes vs Gigabits
The terabyte and the gigabit 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 gigabits are in a terabyte?
One terabyte equals 8000 gigabits.
What is the formula to convert terabytes to gigabits?
Multiply the number of terabytes by 8000. To reverse it, divide by 8000 instead.
How do I convert gigabits back to terabytes?
Divide by 8000, which is the same as multiplying by 0.000125.
How many gigabits are in 10 terabytes?
10 TB works out to 80000 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.