Gigabits to Kilobytes
An instant gigabits-to-kilobytes converter, with the formula and a reference table below.
| Gigabits | Kilobytes |
|---|---|
| 1 Gb | 125000 KB |
| 2 Gb | 250000 KB |
| 3 Gb | 375000 KB |
| 5 Gb | 625000 KB |
| 10 Gb | 1250000 KB |
| 25 Gb | 3125000 KB |
| 50 Gb | 6250000 KB |
| 100 Gb | 12500000 KB |
How to use
- Enter a value in the Gigabits field.
- The Kilobytes figure appears immediately — no button to press.
- Typing in the Kilobytes field converts back to Gigabits the same way.
- Use the reference table for the values that come up most often.
Gigabits to Kilobytes formula
The factor from gigabits to kilobytes is 125000.
KB = Gb × 125000
Why this factor: the gigabit and the kilobyte are both defined against the byte, so dividing one definition by the other gives 125000 directly. Both definitions are set out in full below.
To go the other way, divide by 125000 — or use the Kilobytes to Gigabits converter, which is the same calculation reversed.
Worked example
Take 64 Gb and multiply by the factor 125000: the result is 8000000 KB.
64 Gb × 125000 = 8000000 KB
The converter above does this for any value you type, in either direction.
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.
What is a kilobyte?
A kilobyte is 1,000 bytes in the decimal convention used by storage manufacturers and standards bodies.
Definition: Exactly 1,000 bytes under SI prefixes. The binary equivalent, 1,024 bytes, is properly the kibibyte (KiB).
Where it is used: Small file sizes, text documents, and web page weights.
Worth knowing: This decimal-versus-binary split is why a '1 TB' drive shows as about 931 GB in Windows: the drive uses 10¹², the OS displays 2⁴⁰.
Gigabits vs Kilobytes
The gigabit and the kilobyte 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 kilobytes are in a gigabit?
One gigabit equals 125000 kilobytes.
What is the formula to convert gigabits to kilobytes?
Multiply the number of gigabits by 125000. To reverse it, divide by 125000 instead.
How do I convert kilobytes back to gigabits?
Divide by 125000, which is the same as multiplying by 8e-06.
How many kilobytes are in 10 gigabits?
10 Gb works out to 1250000 KB.
Is there anything to watch out for with kilobytes?
This decimal-versus-binary split is why a '1 TB' drive shows as about 931 GB in Windows: the drive uses 10¹², the OS displays 2⁴⁰.
How is the gigabit defined?
Exactly 1,000,000,000 bits, so exactly 125,000,000 bytes.