Terabytes to petabytes
Type a value in terabytes to see it in petabytes straight away, or type in the second box to convert back.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the terabytes box.
- Read the result in petabytes as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
PB = TB × 0.001
Multiply the value in terabytes by 0.001 to get petabytes.
Example
To convert 25 TB to petabytes: 25 × 0.001 = 0.025 PB.
Conversion table
| Terabytes (TB) | Petabytes (PB) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1,000 | 1 |
About the units
- Terabyte
- A decimal unit equal to exactly 10^12 bytes, which is 1000 decimal gigabytes.
- Petabyte
- A decimal unit equal to exactly 10^15 bytes, which is 1000 decimal terabytes.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many petabytes are in one terabyte?
1 TB = 0.001 PB exactly.
How do I convert terabytes to petabytes?
Use PB = TB × 0.001. For example, 25 TB = 0.025 PB.
How many terabytes are in one petabyte?
1 PB = 1,000 TB.
Why does a 1 TB drive show about 931 GB on my computer?
Drive makers count 1 TB as 10^12 bytes, while Windows divides by 2^30 and labels the result GB even though it is really GiB. So 10^12 ÷ 1,073,741,824 gives about 931.32, and no space is missing.
What is the difference between a kilobyte and a kibibyte?
A kilobyte (kB) is a decimal unit of 1000 bytes and a kibibyte (KiB) is a binary unit of 1024 bytes. The same split applies to mega and mebi, giga and gibi, and the gap grows at each step.