Petabytes to Gigabytes (PB to GB) Converter
1 petabyte equals 1,000,000 gigabytes — multiply the number of petabytes by 1,000,000 to convert. In the decimal (SI) system a petabyte is 10^15 bytes and a gigabyte is 10^9 bytes, so one petabyte is a million gigabytes (a thousand terabytes).
The formula
To convert petabytes to gigabytes, multiply by 1,000,000:
GB = PB × 1000000
For example, 2.5 PB is 2.5 × 1000000 = 2,500,000 GB. To reverse it, divide by 1,000,000 (or multiply by 1e-6).
Conversion table
| Petabytes (PB) | Gigabytes (GB) |
|---|---|
| 1 | 1,000,000 |
| 2 | 2,000,000 |
| 5 | 5,000,000 |
| 10 | 10,000,000 |
| 25 | 25,000,000 |
| 50 | 50,000,000 |
| 100 | 100,000,000 |
| 250 | 250,000,000 |
| 500 | 500,000,000 |
| 1000 | 1,000,000,000 |
How to convert online
- Type the number of petabytes into the first box.
- Read the equivalent value in gigabytes instantly in the second box.
- Or enter a gigabyte value to convert back to petabytes — it works both ways.
Use the Petabyte to Gigabyte Converter — free and instant in your browser.
Where this conversion is used
Gigabytes are the unit people know from phones, drives and download quotas, while petabytes describe enterprise storage, backups and cloud infrastructure. Converting petabytes to gigabytes makes huge capacities relatable — for example seeing that 1 PB equals a million one-gigabyte files — which helps with capacity planning and cost estimates. The relationship also makes cloud pricing easier to reason about: if a provider charges per gigabyte-month, a 5 PB archive is billed as 5,000,000 GB, so even a fraction of a cent per gigabyte adds up to a substantial monthly figure. Because the decimal factor is a clean one million, you can convert by simply appending six zeros, but the converter below is faster for awkward decimals and instantly reverses gigabytes back to petabytes when you are sizing a migration or a backup window.
FAQ
How many gigabytes are in a petabyte?
One petabyte equals 1,000,000 gigabytes. Multiply petabytes by 1,000,000, so 10 PB = 10,000,000 GB.
What is the formula to convert petabytes to gigabytes?
GB = PB × 1000000. For example, 5 PB = 5,000,000 GB.
How do I convert gigabytes back to petabytes?
Divide the gigabyte value by 1,000,000, or multiply by 1e-6. So 10,000,000 GB = 10 PB.
Is this decimal or binary?
This uses the decimal (SI) convention where each step is 1,000. Binary units (pebibyte to gibibyte) step by 1,024 and give slightly different totals.
Related converters
- Gigabyte to Petabyte Converter
- Petabyte to Byte Converter
- Petabyte to Bit Converter
- Petabyte to Megabyte Converter
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Recommended reading
Gigabyte to Petabyte (GB to PB) Converter
1 gigabyte equals 0.000001 petabytes. Divide GB by one million to convert. Free formula, reference table and instant online converter.
Terabyte to Petabyte Converter (TB to PB)
1 terabyte equals 0.001 petabytes. See the TB to PB formula, a table of common values, and convert instantly in your browser.
Terabyte to Megabyte Converter (TB to MB)
1 terabyte equals 1,000,000 megabytes. See the TB to MB formula, a table of common values, and convert instantly in your browser.
Terabyte to Kilobyte Converter (TB to KB)
1 terabyte equals 1,000,000,000 kilobytes. See the TB to KB formula, a table of common values, and convert instantly in your browser.