Petabytes to Gigabytes
Type a value in either box to convert between petabytes and gigabytes. The factor is 1e+06.
| Petabytes | Gigabytes |
|---|---|
| 1 PB | 1000000 GB |
| 2 PB | 2000000 GB |
| 3 PB | 3000000 GB |
| 5 PB | 5000000 GB |
| 10 PB | 10000000 GB |
| 25 PB | 25000000 GB |
| 50 PB | 50000000 GB |
| 100 PB | 100000000 GB |
How to use
- Enter a value in the Petabytes field.
- The Gigabytes figure appears immediately — no button to press.
- Typing in the Gigabytes field converts back to Petabytes the same way.
- Use the reference table for the values that come up most often.
Petabytes to Gigabytes formula
To convert petabytes to gigabytes, multiply by 1000000.
GB = PB × 1000000
Why this factor: the petabyte and the gigabyte are both defined against the byte, so dividing one definition by the other gives 1000000 directly. Both definitions are set out in full below.
To go the other way, divide by 1000000 — or use the Gigabytes to Petabytes converter, which is the same calculation reversed.
Worked example
Take 4 PB and multiply by the factor 1000000: the result is 4000000 GB.
4 PB × 1000000 = 4000000 GB
The converter above does this for any value you type, in either direction.
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.
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.
Petabytes vs Gigabytes
The petabyte 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 petabyte?
One petabyte equals 1000000 gigabytes.
What is the formula to convert petabytes to gigabytes?
Multiply the number of petabytes by 1000000. To reverse it, divide by 1000000 instead.
How do I convert gigabytes back to petabytes?
Divide by 1000000, which is the same as multiplying by 1e-06.
How many gigabytes are in 10 petabytes?
10 PB works out to 10000000 GB.
How is the petabyte defined?
Exactly 1×10¹⁵ bytes under SI prefixes.