Gigabytes (GB) to Petabytes (PB) Converter
Enter your Gigabytes (GB) value to convert to Petabytes (PB). 1 GB = 0.000001 PB, calculated across both decimal (SI) and binary (IEC) standards.
Convert Gigabytes to Petabytes
Do you want to convert petabytes to gigabytes?
How to Convert Gigabytes to Petabytes
To convert gigabytes to petabytes, divide by 1,000,000 (using SI decimal). Both units measure storage capacity—the difference is scale. You might also need: PB to GB.
GB: A gigabyte is 1,000 megabytes or 1,000,000,000 bytes using the SI decimal standard. This is what hard drive manufacturers typically use. You might also need: Gigabytes in Exbibits.
PB: A petabyte is 1,000 terabytes or 1,000,000,000,000,000 bytes. Used for large-scale enterprise and cloud storage. Learn more: converting Kilobits to Petabytes.
1 GB = 0.000001 PB (using SI decimal standard) — or equivalently, 1 PB = 1,000,000GB.
GB to PB Conversion Formula
// Convert GB to PB
PB = GB × 0.000001
// Reverse: Convert PB to GB
GB = PB × 1,000,000
GB to PB Conversion Examples
100 GB = 0.0001 PB
256 GB = 0.000256 PB
500 GB = 0.0005 PB
1,000 GB = 0.001 PB
2,048 GB = 0.002048 PB
Binary Standard (Base 1024)
Using binary calculation: 1 GB = 0.000000953674316 PB
100 GB = 0.000095367431641 PB
1,000 GB = 0.000953674316 PB
1,024 GB = 0.0009765625 PB
What Is a Gigabyte?
A gigabyte is 1,000 megabytes or 1,000,000,000 bytes using the SI decimal standard. This is what hard drive manufacturers typically use. Check out our Gb to B conversion rate.
The gigabyte is a SI decimal unit of digital information storage. It uses base 1,000 following the SI (International System of Units) standard. Try the calculate Mbps to YB/s.
Common uses: Movies, video games, smartphone storage, USB drives, cloud storage plans You might also need: how many Bits in a GB.
1 GB = 8 × 10⁹ bits = 1 × 10⁹ bytes.
The gigabyte can be abbreviated as GB; for example, 1 gigabyte can be written as 1 GB.
What Is a Petabyte?
A petabyte is 1,000 terabytes or 1,000,000,000,000,000 bytes. Used for large-scale enterprise and cloud storage. Try the how many PB in Yobibits.
The petabyte is a SI decimal unit of digital information storage. It uses base 1,000 following the SI (International System of Units) standard. Try the Gibibytes to TB.
Common uses: Data centers, cloud storage providers, scientific research, enterprise archives You might also need: convert Pbps to Gigabytes Per Second.
1 PB = 8 × 10¹⁵ bits = 1 × 10¹⁵ bytes.
The petabyte can be abbreviated as PB; for example, 1 petabyte can be written as 1 PB.
Gigabyte to Petabyte Conversion Table
The table below shows various gigabyte measurements converted to petabytes.
| Gigabytes | Petabytes | Petabytes (Binary) |
|---|---|---|
| 1 GB | 0.000001 PB | 0.000000953674 PB |
| 2 GB | 0.000002 PB | 0.000001907349 PB |
| 5 GB | 0.000005 PB | 0.000004768372 PB |
| 10 GB | 0.00001 PB | 0.000009536743 PB |
| 25 GB | 0.000025 PB | 0.000023841858 PB |
| 50 GB | 0.00005 PB | 0.000047683716 PB |
| 100 GB | 0.0001 PB | 0.000095367432 PB |
| 128 GB | 0.000128 PB | 0.0001220703 PB |
| 250 GB | 0.00025 PB | 0.0002384186 PB |
| 256 GB | 0.000256 PB | 0.0002441406 PB |
| 500 GB | 0.0005 PB | 0.0004768372 PB |
| 512 GB | 0.000512 PB | 0.0004882813 PB |
| 1,000 GB | 0.001 PB | 0.0009536743 PB |
| 1,024 GB | 0.001024 PB | 0.0009765625 PB |
SI Decimal vs Binary: Why Two Different Standards?
When converting gigabytes to petabytes, different tools may give slightly different results. This is because there are two competing standards for measuring digital storage:
| Standard | Base | 1 KB equals | Used By |
|---|---|---|---|
| SI Decimal | 1000 | 1,000 bytes | Hard drive manufacturers, macOS, network speeds |
| Binary (IEC) | 1024 | 1,024 bytes | Windows, Linux (partially), RAM specifications |
Why Does My Hard Drive Show Less Space Than Advertised?
This difference in standards explains the common "missing hard drive space" confusion.
Example: A "500 GB" Hard Drive
- Contains exactly: 500,000,000,000 bytes
- macOS (SI Decimal): Displays 500 GB (divides by 1,000³)
- Windows (Binary): Displays 465 GB (divides by 1,024³)
The Verdict: Same bytes, same drive—just different math. No space is actually missing.
Note: Our calculator defaults to SI decimal (base 1000) to match the box label. To match Windows, toggle the standard at the top of the calculator.
💡 Storage Engineer Tip
Manufacturers label drives using SI decimal (base 1000). Windows divides by 1024 instead—that's why a "1 TB" drive shows as 931 GB. Same bytes, different math.
— Subash Geetha Krishnan, 15+ years in enterprise storage
When to Convert GB to PB
Common scenario: Planning storage allocation, comparing specifications, or converting between gigabyte and petabyte for capacity planning. Check out our Gigabytes to ZiB calculator.
Other situations include storage planning for calculating how much data fits in a given capacity, file management for understanding sizes across different scales, cost estimation for budgeting cloud storage, and backup planning for determining media requirements. You might also need: Eib to PB converter.