How to convert terabytes to petabytes
To convert terabytes (TB) to petabytes (PB), multiply the value in terabytes by 0.001.
PB = TB × 0.001 (decimal)
PB = TB × 0.0009765625 (binary)
Example: 5 TB = 0.005 PB, or 0.0048828125 PB in binary.
Decimal (SI) counting steps by 1,000 and is what drive makers, macOS and phones use. Binary counting steps by 1,024 and is what Windows and RAM use; its unambiguous IEC names are KiB, MiB and GiB. Bits are decimal either way.
You can also type 5 TB to PB into the smart calculator, or mix units: 1 TB + 1 PB.
Terabytes to Petabytes conversion table
| Terabytes | Petabytes (decimal) | Petabytes (binary) |
|---|---|---|
| 0.01 TB | 0.00001 PB | 0.000009765625 PB |
| 0.1 TB | 0.0001 PB | 0.00009765625 PB |
| 0.25 TB | 0.00025 PB | 0.00024414063 PB |
| 0.5 TB | 0.0005 PB | 0.00048828125 PB |
| 1 TB | 0.001 PB | 0.0009765625 PB |
| 2 TB | 0.002 PB | 0.001953125 PB |
| 3 TB | 0.003 PB | 0.0029296875 PB |
| 4 TB | 0.004 PB | 0.00390625 PB |
| 5 TB | 0.005 PB | 0.0048828125 PB |
| 6 TB | 0.006 PB | 0.005859375 PB |
| 7 TB | 0.007 PB | 0.0068359375 PB |
| 8 TB | 0.008 PB | 0.0078125 PB |
| 9 TB | 0.009 PB | 0.0087890625 PB |
| 10 TB | 0.01 PB | 0.009765625 PB |
| 12 TB | 0.012 PB | 0.01171875 PB |
| 15 TB | 0.015 PB | 0.014648438 PB |
| 20 TB | 0.02 PB | 0.01953125 PB |
| 25 TB | 0.025 PB | 0.024414063 PB |
| 30 TB | 0.03 PB | 0.029296875 PB |
| 40 TB | 0.04 PB | 0.0390625 PB |
| 50 TB | 0.05 PB | 0.048828125 PB |
| 60 TB | 0.06 PB | 0.05859375 PB |
| 75 TB | 0.075 PB | 0.073242188 PB |
| 100 TB | 0.1 PB | 0.09765625 PB |
| 250 TB | 0.25 PB | 0.24414063 PB |
| 500 TB | 0.5 PB | 0.48828125 PB |
| 1,000 TB | 1 PB | 0.9765625 PB |
Converting petabytes back to terabytes
1 PB = 1,000 TB. See the Petabytes to Terabytes converter, or press the swap button above.
About the units
Terabyte (TB)
In decimal mode 1,000 GB, which is how drives are sold; in binary mode 1,024 GB.
Petabyte (PB)
In decimal mode 1,000 TB; in binary mode 1,024 TB.
Digital storage is counted in bits and bytes (1 byte = 8 bits). There are two ways to count bytes. Decimal (SI) prefixes step by 1,000: 1 KB = 1,000 B and 1 GB = 1,000 MB, which is how drive makers, macOS, iOS and Android report sizes. Binary prefixes step by 1,024: 1 KB = 1,024 B and 1 GB = 1,024 MB, which is how Windows and RAM count (the IEC names for these are KiB, MiB and GiB). Bits are always decimal: 1 Kb = 1,000 b.
Questions and answers
How many petabytes are in a terabyte?
One terabyte (TB) equals 0.001 petabytes in decimal (SI) counting, or 0.0009765625 petabytes in binary counting (1 KB = 1,024 B), which Windows uses.
How do I convert terabytes to petabytes?
To convert terabytes to petabytes, multiply the value in terabytes by 0.001. The formula is PB = TB × 0.001. For example, 5 TB = 0.005 PB.
What is 5 TB in PB?
5 terabytes is 0.005 petabytes.
Which is bigger, a terabyte or a petabyte?
A petabyte is bigger: 1 PB = 1,000 TB.
Is 1 GB equal to 1,000 MB or 1,024 MB?
Both are in use. In decimal (SI) counting, which drive makers, macOS, iOS and Android use, 1 GB = 1,000 MB. In binary counting, which Windows and RAM use, 1 GB = 1,024 MB; the unambiguous IEC name for that size is the gibibyte (GiB). ConvertEasy has a Decimal / Binary switch so KB, MB, GB and TB follow whichever you need, while KiB, MiB and GiB are always binary.
Are kilobits 1,000 or 1,024 bits?
ConvertEasy treats bits as decimal in both modes: 1 Kb = 1,000 b, 1 Mb = 1,000 Kb. A byte is always 8 bits, so only byte units (KB, MB, GB…) change with the switch.
Does this TB to PB converter work offline?
Yes. ConvertEasy is a progressive web app: after your first visit it keeps working with no connection, and you can install it to your home screen from the browser menu.