How many bytes are in 1 petabyte (SI)?

1 petabyte (PB) in the SI decimal standard equals exactly 1,000,000,000,000,000 bytes — that is 10^15 bytes or one quadrillion bytes. Cloud storage providers and hard drive manufacturers use this definition.

How many bytes are in 1 pebibyte (IEC binary)?

1 pebibyte (PiB) in the IEC binary standard equals exactly 2^50 = 1,125,899,906,842,624 bytes. This is about 12.59% larger than a decimal petabyte. Most Linux tools and operating systems report storage in binary units while sometimes labeling them "PB".

What is the difference between PB and PiB in bytes?

1 PB (SI) = 1,000,000,000,000,000 bytes. 1 PiB (IEC) = 1,125,899,906,842,624 bytes. A pebibyte is 125,899,906,842,624 bytes larger than a petabyte — about 12.59% more. Always verify which standard your storage vendor uses to avoid budget surprises.

How many gigabytes are in 1 petabyte?

Using SI decimal units, 1 PB = 1,000,000 GB. Using IEC binary units, 1 PiB = 1,073,741,824 GiB. The shorthand "one million gigabytes" is a common approximation for 1 PB.

Can JavaScript accurately represent petabyte-scale byte counts?

JavaScript's Number type uses 64-bit floating point, exact for integers up to 2^53 (about 9 quadrillion). Since 1 PiB = 2^50, byte counts up to about 8 PiB remain exact. Beyond that, small rounding errors may appear — the tool notes this for very large inputs.

Petabytes to Bytes Converter

Name: Petabytes to Bytes Converter
Availability: InStock
Author: Nham Vu

Enter a petabyte value and instantly see the exact byte count, plus all intermediate units from kilobytes to petabytes.

Enter Petabyte Value

Number of Petabytes

Input standard

Results

Enter a value and click Convert to see results.

Bytes (B)

—

SI Decimal (powers of 1,000)

Kilobytes (KB)

—

Megabytes (MB)

—

Gigabytes (GB)

—

Terabytes (TB)

—

Petabytes (PB)

—

IEC Binary (powers of 1,024)

Kibibytes (KiB)

—

Mebibytes (MiB)

—

Gibibytes (GiB)

—

Tebibytes (TiB)

—

Pebibytes (PiB)

—

Common Petabyte Conversions

Petabytes (PB)	Bytes	Terabytes (TB)	Gigabytes (GB)

Click any row to load that petabyte value into the converter.

Copied!

Summary

Enter a petabyte value and instantly see the exact byte count, plus all intermediate units from kilobytes to petabytes.

How it works

Enter any petabyte value in the input field.
Choose the input standard: SI petabytes (PB, 1 PB = 10^15 B) or IEC pebibytes (PiB, 1 PiB = 2^50 B).
Click Convert to see the exact byte count and all intermediate units.
All SI units (KB, MB, GB, TB) and IEC units (KiB, MiB, GiB, TiB) are shown simultaneously.
Click any result row to copy that value.
Use the reference table to load common petabyte benchmarks into the converter.

Use cases

Find the exact byte count for a 1 PB cloud storage allocation.
Verify vendor storage specs by checking whether PB means decimal or binary.
Estimate bytes needed for petabyte-scale data lakes or backups.
Convert genomics, video archive, or telemetry dataset sizes to bytes.
Understand the gap between 1 PB (SI) and 1 PiB (IEC) for capacity planning.
Quick reference for data center engineers planning storage infrastructure.

Frequently Asked Questions

Last updated: 2026-07-23 · Reviewed by Nham Vu