Petabytes to Terabytes
Convert petabytes to terabytes instantly — one petabyte is 1000 terabytes.
| Petabytes | Terabytes |
|---|---|
| 1 PB | 1000 TB |
| 2 PB | 2000 TB |
| 3 PB | 3000 TB |
| 5 PB | 5000 TB |
| 10 PB | 10000 TB |
| 25 PB | 25000 TB |
| 50 PB | 50000 TB |
| 100 PB | 100000 TB |
How to use
- Enter a value in the Petabytes field.
- The Terabytes figure appears immediately — no button to press.
- Typing in the Terabytes field converts back to Petabytes the same way.
- Use the reference table for the values that come up most often.
Petabytes to Terabytes formula
The factor from petabytes to terabytes is 1000.
TB = PB × 1000
Put another way, one petabyte is exactly 1,000 terabytes.
Why this factor: the petabyte and the terabyte are both defined against the byte, so dividing one definition by the other gives 1000 directly. Both definitions are set out in full below.
To go the other way, divide by 1000 — or use the Terabytes to Petabytes converter, which is the same calculation reversed.
Worked example
Take 4 PB and multiply by the factor 1000: the result is 4000 TB.
4 PB × 1000 = 4000 TB
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 terabyte?
A terabyte is one trillion bytes, the standard capacity unit for hard drives and large archives.
Definition: Exactly 1×10¹² bytes under SI prefixes. The binary tebibyte (TiB) is about 1.1×10¹² bytes.
Where it is used: Hard drive and SSD capacity, backup archives, and database sizes.
Worth knowing: A 1 TB drive reports as roughly 931 GiB in an operating system that counts in powers of two — the storage is not missing, just labelled differently.
Petabytes vs Terabytes
The petabyte and the terabyte 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 terabytes are in a petabyte?
One petabyte equals 1000 terabytes.
What is the formula to convert petabytes to terabytes?
Multiply the number of petabytes by 1000. To reverse it, divide by 1000 instead.
How do I convert terabytes back to petabytes?
Divide by 1000, which is the same as multiplying by 0.001.
How many terabytes are in 10 petabytes?
10 PB works out to 10000 TB.
Is there anything to watch out for with terabytes?
A 1 TB drive reports as roughly 931 GiB in an operating system that counts in powers of two — the storage is not missing, just labelled differently.
How is the petabyte defined?
Exactly 1×10¹⁵ bytes under SI prefixes.