Terabytes to Petabytes Converter

One Terabyte equals 0.001 Petabytes (1 TB = 0.001 PB). Multiply a Terabyte value by 0.001 to get the equivalent in Petabytes. Enter a value above to calculate the result. You can also use the formula and reference table below.

Formula

PB = TB × 0.001

Multiply the Terabyte value by 0.001 to get the equivalent value in Petabytes.

Example Conversions

1 Terabyte (TB)

0.001 Petabyte (PB)

5 Terabyte (TB)

0.005 Petabyte (PB)

10 Terabyte (TB)

0.01 Petabyte (PB)

25 Terabyte (TB)

0.025 Petabyte (PB)

100 Terabyte (TB)

0.1 Petabyte (PB)

Conversion Table

Common conversion values from Terabyte to Petabyte
Terabyte (TB)Petabyte (PB)
0.10.0001
0.50.0005
10.001
20.002
50.005
100.01
250.025
500.05
1000.1
2500.25
5000.5
10001

How to Convert Manually

Use these steps to convert Terabyte values to Petabyte without the calculator.

  1. Write down the value in Terabyte (TB) that you want to convert.
  2. Multiply that value by 0.001.
  3. For example, 10 Terabytes × 0.001 = 0.01 Petabytes.
  4. Label the result as Petabyte (PB).

Relative Size Comparison

1 Terabyte
1 Petabyte1000 Terabytes
1 PB

This chart shows the visual difference in size between exactly one Terabyte and one Petabyte.

About Terabyte and Petabyte

The terabyte is an SI decimal data unit equal to exactly 1,000 gigabytes, or one trillion bytes. Drives, backup systems, and media libraries are commonly terabyte-scale. The petabyte is an SI decimal data unit equal to exactly 1,000 terabytes, or one quadrillion bytes. Data centers, scientific datasets, and cloud platforms operate at petabyte scale. One Terabyte equals 0.001 Petabytes (1 TB = 0.001 PB). Terabyte is used in hard drive and SSD capacity and in backup and archive storage. Petabyte is used in data center capacity.

Precision and Rounding:This converter keeps SI decimal prefixes (1 KB = 1,000 bytes) separate from IEC binary prefixes (1 KiB = 1,024 bytes). Match the symbol used by your source before converting because some operating-system interfaces display binary quantities with decimal labels.

See our guide to megabits vs. megabytes if you're unsure which one your download speed is quoted in.

Data units follow NIST guidance: decimal SI prefixes use powers of 1,000, while IEC binary prefixes use powers of 1,024 (reference).

Worked Example

15Terabytes equals0.015Petabytes.

15 TB × 0.001 = 0.015 PB

FAQ

How do I convert Terabyte to Petabyte?

Multiply the Terabyte value by 0.001 to get the equivalent value in Petabytes.

What is the formula for Terabyte to Petabyte?

The formula is PB = TB × 0.001.

How many Petabytes are in 1 Terabyte?

1 Terabyte equals 0.001 Petabytes.

Can I convert Petabyte back to Terabyte?

Yes. 1 Petabyte equals 1000 Terabytes, and the related converter can reverse the calculation.

What are common names for Terabyte and Petabyte?

Terabyte is shown as TB and may also be searched as terabytes, tb, decimal terabyte. Petabyte is shown as PB and may also be searched as petabytes, pb, decimal petabyte.

Was this page helpful?

Let us know if this converter met your needs.

Related Converters