How to convert terabytes to petabytes
To convert terabytes to petabytes, multiply by 0.001. Data size conversions matter for file uploads, cloud storage plans, hard drives and internet usage. Decimal (SI) prefixes are used: 1 KB = 1,000 bytes.
Terabyte to Petabyte conversion table
| Terabyte (TB) | Petabyte (PB) |
|---|---|
| 0.1 TB | 0.0001 PB |
| 0.5 TB | 0.0005 PB |
| 1 TB | 0.001 PB |
| 2 TB | 0.002 PB |
| 3 TB | 0.003 PB |
| 4 TB | 0.004 PB |
| 5 TB | 0.005 PB |
| 10 TB | 0.01 PB |
| 20 TB | 0.02 PB |
| 25 TB | 0.025 PB |
| 50 TB | 0.05 PB |
| 100 TB | 0.1 PB |
| 500 TB | 0.5 PB |
| 1,000 TB | 1 PB |
About the units
Terabyte (TB)
A terabyte is 1,000 gigabytes, the typical size of modern hard drives and SSDs.
Petabyte (PB)
A petabyte is 1,000 terabytes, used for data centers and big-data archives.
How to use this converter
- Type the number of terabytes (TB) in the input box.
- The result in petabytes appears instantly — no button needed.
- See the same value in every other data storage unit just below.
- Use “Swap units” to convert petabytes back to terabytes.
When you’ll use the terabyte to petabyte conversion
Converting terabytes to petabytes comes up more often than you might expect — for example when planning backups, checking whether a file fits an upload limit, or comparing phone or cloud storage plans. Type your number once and you get the exact answer plus every related unit, so you don’t need to convert twice.
💡 The factor is exact and easy to remember: 1 TB = 0.001 PB.
Watch out for these mix-ups
- Drive makers use 1 KB = 1,000 bytes; operating systems often show KiB (1,024).
- Internet speeds are in bits per second, file sizes in bytes — a factor of 8.
Tips for better results
- Double-check which system a unit belongs to (for example US vs UK gallons).
- Use the swap button to convert in the opposite direction instantly.
- Bookmark the conversions you use most — each pair has its own page.
Frequently asked questions
How many petabytes are in one terabyte?
One terabyte equals 0.001 petabytes. 0.001 is the exact factor used by this converter.
How do I convert terabytes to petabytes?
Multiply the value in terabytes by 0.001. To go the other way, multiply petabytes by 1,000.
What is 10 TB in PB?
10 TB = 0.01 PB. Also, 5 TB = 0.005 PB and 100 TB = 0.1 PB.
What is the difference between a terabyte and a petabyte?
A terabyte is 1,000 gigabytes, the typical size of modern hard drives and SSDs. A petabyte is 1,000 terabytes, used for data centers and big-data archives.
Is this tool free and private?
Yes — the Terabyte to Petabyte is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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