Terabyte to Petabyte Converter (TB to PB)

1 terabyte equals 0.001 petabytes — divide the number of terabytes by 1000 (or multiply by 0.001) to convert to petabytes. A petabyte is a thousand terabytes, so a single terabyte is one thousandth of a petabyte.

The formula

To convert terabytes to petabytes, multiply by the exact factor 0.001:

PB = TB × 0.001

For example, 500 TB × 0.001 = 0.5 PB. To reverse it, multiply petabytes by 1000.

Conversion table

Terabytes (TB)	Petabytes (PB)
1	0.001
2	0.002
3	0.003
5	0.005
10	0.01
25	0.025
50	0.05
100	0.1
250	0.25
500	0.5
1000	1

How to convert online

Type the number of terabytes in the first box and read the petabytes instantly in the second. Enter a petabyte value instead to convert back — it works both ways — then copy the result or scan the reference table.

Use the Terabyte to Petabyte Converter — free and instant in your browser.

Where this conversion is needed

TB-to-PB conversions matter in data centres, cloud object storage and analytics, where capacity is planned at petabyte scale but drives and volumes are sized in terabytes. Rolling terabytes up into petabytes makes large fleet totals easier to reason about.

FAQ

How many petabytes are in a terabyte?

One terabyte equals 0.001 petabytes. So 10 TB = 0.01 PB and 1000 TB = 1 PB.

What is the formula to convert TB to PB?

PB = TB × 0.001. The converter applies this exact factor automatically.

How do I convert petabytes back to terabytes?

Multiply by 1000. So 0.5 PB = 500 TB.

Is the conversion exact?

Yes, in decimal (SI) units it is exact: 1000 TB = 1 PB. Binary units (1 PiB = 1024 TiB) differ slightly.

Related converters

• Petabyte to Terabyte Converter
• Terabyte to Gigabyte Converter
• Terabyte to Megabyte Converter
• Terabyte to Kilobyte Converter

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