Data Storage converter
Petabytes to Terabytes
Converting Petabytes to Terabytes is a single multiplication when you know the factor. One PB equals 1,000 TB, so multiply the value in PB by 1,000. The calculator below works in both directions and accepts decimals.
Formula 1 PB = 1,000 TB
Need the other direction? Terabytes to Petabytes.
How to convert Petabytes to Terabytes
A decimal petabyte is 10^15 bytes; a pebibyte is 2^50 bytes. A decimal terabyte is 10^12 bytes; a tebibyte is 2^40 bytes, about 9.95% more.
To convert Petabytes to Terabytes, multiply the value in PB by 1,000. For example, 10 PB × 1,000 = 10,000 TB. This works because the ratio between the two units is constant for every value in data storage.
Worked examples
| PB | TB |
|---|---|
| 1 PB | 1,000 TB |
| 2.5 PB | 2,500 TB |
| 5 PB | 5,000 TB |
| 10 PB | 10,000 TB |
| 25 PB | 25,000 TB |
| 50 PB | 50,000 TB |
| 100 PB | 100,000 TB |
Reverse conversion
| TB | PB |
|---|---|
| 1 TB | 0.001 PB |
| 5 TB | 0.005 PB |
| 10 TB | 0.01 PB |
| 25 TB | 0.025 PB |
| 50 TB | 0.05 PB |
| 100 TB | 0.1 PB |
When this conversion is useful
This is the calculation you need when you are sizing a backup, a download or a storage plan and the units are mixed. Because the factor is fixed, you can use the same number for a single measurement or for a batch: 1,000 PB is 1,000,000 TB.
Is the conversion exact?
It depends on the definition. This converter uses decimal units (1 kB = 1,000 bytes) and a bit-based base; binary units such as KiB and GiB are separate units in the list.
Reference: BIPM SI Brochure and NIST SP 811. Last reviewed: 2026-11-01.
PB to TB conversion chart
The chart lists the most requested values. For a value that is not here, use the converter at the top of the page.
| Petabytes (PB) | Terabytes (TB) |
|---|---|
| 1 PB | 1,000 TB |
| 2 PB | 2,000 TB |
| 3 PB | 3,000 TB |
| 4 PB | 4,000 TB |
| 5 PB | 5,000 TB |
| 6 PB | 6,000 TB |
| 7 PB | 7,000 TB |
| 8 PB | 8,000 TB |
| 9 PB | 9,000 TB |
| 10 PB | 10,000 TB |
| 11 PB | 11,000 TB |
| 12 PB | 12,000 TB |
| 13 PB | 13,000 TB |
| 14 PB | 14,000 TB |
| 15 PB | 15,000 TB |
| 16 PB | 16,000 TB |
| 17 PB | 17,000 TB |
| 18 PB | 18,000 TB |
| 19 PB | 19,000 TB |
| 20 PB | 20,000 TB |
| 21 PB | 21,000 TB |
| 22 PB | 22,000 TB |
| 23 PB | 23,000 TB |
| 24 PB | 24,000 TB |
| 25 PB | 25,000 TB |
| 26 PB | 26,000 TB |
| 27 PB | 27,000 TB |
| 28 PB | 28,000 TB |
| 29 PB | 29,000 TB |
| 30 PB | 30,000 TB |
| 31 PB | 31,000 TB |
| 32 PB | 32,000 TB |
| 33 PB | 33,000 TB |
| 34 PB | 34,000 TB |
| 35 PB | 35,000 TB |
| 36 PB | 36,000 TB |
| 37 PB | 37,000 TB |
| 38 PB | 38,000 TB |
| 39 PB | 39,000 TB |
| 40 PB | 40,000 TB |
| 41 PB | 41,000 TB |
| 42 PB | 42,000 TB |
| 43 PB | 43,000 TB |
| 44 PB | 44,000 TB |
| 45 PB | 45,000 TB |
| 46 PB | 46,000 TB |
| 47 PB | 47,000 TB |
| 48 PB | 48,000 TB |
| 49 PB | 49,000 TB |
| 50 PB | 50,000 TB |
| 60 PB | 60,000 TB |
| 70 PB | 70,000 TB |
| 80 PB | 80,000 TB |
| 90 PB | 90,000 TB |
| 100 PB | 100,000 TB |
Frequently asked questions
How many Terabytes are in 1 Petabytes?
1 PB equals 1,000 TB.
How do I convert Petabytes to Terabytes?
Multiply the PB value by 1,000. Example: 25 PB = 25,000 TB.
What is 2.5 PB in TB?
2.5 PB = 2,500 TB.
Is the PB to TB conversion exact?
It depends on the definition. This converter uses decimal units (1 kB = 1,000 bytes) and a bit-based base; binary units such as KiB and GiB are separate units in the list.
Does the calculator work offline?
Yes. The conversion runs in your browser with JavaScript, so it works after the page has loaded, even without a connection.