Gigabits to Bytes
Convert gigabits to bytes instantly — one gigabit is 1.25e+08 bytes.
| Gigabits | Bytes |
|---|---|
| 1 Gb | 125000000 B |
| 2 Gb | 250000000 B |
| 3 Gb | 375000000 B |
| 5 Gb | 625000000 B |
| 10 Gb | 1250000000 B |
| 25 Gb | 3125000000 B |
| 50 Gb | 6250000000 B |
| 100 Gb | 12500000000 B |
How to use
- Enter a value in the Gigabits field.
- The Bytes figure appears immediately — no button to press.
- Typing in the Bytes field converts back to Gigabits the same way.
- Use the reference table for the values that come up most often.
Gigabits to Bytes formula
Converting gigabits to bytes is a single multiplication by 125000000.
B = Gb × 125000000
Why this factor: the gigabit and the byte are both defined against the byte, so dividing one definition by the other gives 125000000 directly. Both definitions are set out in full below.
To go the other way, divide by 125000000 — or use the Bytes to Gigabits converter, which is the same calculation reversed.
Worked example
Given 4 Gb, multiplying by 125000000 yields 500000000 B.
4 Gb × 125000000 = 500000000 B
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 byte?
A byte is eight bits — historically the space for one text character, and the standard unit of file size.
Definition: Exactly 8 bits.
Where it is used: File and storage sizes, memory capacity, and data quotas.
Gigabits vs Bytes
The gigabit and the byte 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 bytes are in a gigabit?
One gigabit equals 125000000 bytes.
What is the formula to convert gigabits to bytes?
Multiply the number of gigabits by 125000000. To reverse it, divide by 125000000 instead.
How do I convert bytes back to gigabits?
Divide by 125000000, which is the same as multiplying by 8e-09.
How many bytes are in 10 gigabits?
10 Gb works out to 1250000000 B.
How is the gigabit defined?
Exactly 1,000,000,000 bits, so exactly 125,000,000 bytes.