Gigabits to Petabytes
An instant gigabits-to-petabytes converter, with the formula and a reference table below.
| Gigabits | Petabytes |
|---|---|
| 1 Gb | 1.25e-07 PB |
| 2 Gb | 2.5e-07 PB |
| 3 Gb | 3.75e-07 PB |
| 5 Gb | 6.25e-07 PB |
| 10 Gb | 1.25e-06 PB |
| 25 Gb | 3.125e-06 PB |
| 50 Gb | 6.25e-06 PB |
| 100 Gb | 1.25e-05 PB |
How to use
- Enter a value in the Gigabits field.
- The Petabytes figure appears immediately — no button to press.
- Typing in the Petabytes field converts back to Gigabits the same way.
- Use the reference table for the values that come up most often.
Gigabits to Petabytes formula
The factor from gigabits to petabytes is 1.25e-07.
PB = Gb × 1.25e-07
Why this factor: the gigabit and the petabyte are both defined against the byte, so dividing one definition by the other gives 1.25e-07 directly. Both definitions are set out in full below.
To go the other way, divide by 1.25e-07 — or use the Petabytes to Gigabits converter, which is the same calculation reversed.
Worked example
Start with 500 Gb. Multiply by 1.25e-07 to get 6.25e-05 PB.
500 Gb × 1.25e-07 = 6.25e-05 PB
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 petabyte?
A petabyte is a thousand terabytes — the scale of large-scale data infrastructure.
Definition: Exactly 1×10¹⁵ bytes under SI prefixes.
Where it is used: Data-centre and cloud storage footprints, scientific datasets, and media archives.
Gigabits vs Petabytes
The gigabit and the petabyte 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 petabytes are in a gigabit?
One gigabit equals 1.25e-07 petabytes.
What is the formula to convert gigabits to petabytes?
Multiply the number of gigabits by 1.25e-07. To reverse it, divide by 1.25e-07 instead.
How do I convert petabytes back to gigabits?
Divide by 1.25e-07, which is the same as multiplying by 8000000.
How many petabytes are in 10 gigabits?
10 Gb works out to 1.25e-06 PB.
How is the gigabit defined?
Exactly 1,000,000,000 bits, so exactly 125,000,000 bytes.