Byte to Petabyte Converter (B to PB)

1 byte equals 1 × 10⁻¹⁵ petabytes (PB) — multiply the number of bytes by 0.000000000000001 to convert. A decimal petabyte is 10¹⁵ bytes, so a quadrillion bytes make up a single petabyte.

The formula

Multiply bytes by the exact factor 1e-15:

PB = bytes × 1e-15

For example, 5e14 bytes × 1e-15 = 0.5 PB. To reverse it, divide by 1e-15 or multiply by 10¹⁵.

Conversion table

How to convert online

1. Type the number of bytes into the first box.
2. Read the petabyte result instantly in the second box.
3. Enter a PB value instead to convert back to bytes — it works both ways.

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

Where this conversion is used

Petabytes describe the scale of data warehouses, cloud object stores and large archives, while raw byte totals come from tooling and metadata. Converting bytes to PB lets you express an enormous aggregate byte count in the unit used for capacity planning at data-centre scale.

Scaling and accuracy

At petabyte scale, scientific notation (1e-15) keeps numbers readable — it simply moves the decimal point fifteen places left. The relationship is linear, so 5 × 10¹⁴ bytes = 0.5 PB and 2 × 10¹⁵ bytes = 2 PB. This tool uses decimal (SI) petabytes where 1 PB = 10¹⁵ bytes, the figure used in capacity planning. The binary pebibyte (1 PiB = 2⁵⁰ bytes) is about 12.6% larger, so at this scale the PB-versus-PiB gap is significant — always confirm which unit a storage vendor or report means before sizing infrastructure.

FAQ

How many petabytes are in a byte?

One byte equals 1e-15 PB. Multiply bytes by 1e-15 — for example, 10 bytes = 1e-14 PB.

How many bytes are in a petabyte?

A decimal petabyte holds 10¹⁵ bytes, i.e. 1,000,000,000,000,000 bytes. So 1 PB = one quadrillion bytes.

How do I convert petabytes back to bytes?

Divide by 1e-15, or multiply by 10¹⁵. For instance, 2 PB = 2 × 10¹⁵ bytes.

Is the conversion exact?

Yes. 1e-15 is an exact decimal factor, so results are precise.

Related converters

• Petabyte to Byte Converter
• Byte to Bit Converter
• Byte to Kilobyte Converter
• Byte to Gigabyte Converter

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