How many bits are in a petabyte?

One SI petabyte (PB) equals exactly 8,000,000,000,000,000 bits (8 × 10^15). One IEC pebibyte (PiB) equals 9,007,199,254,740,992 bits (8 × 2^50). Cloud vendors and hard drive makers use SI PB; operating systems typically count in binary PiB internally.

What is the difference between PB and PiB?

PB (petabyte) is the SI decimal unit: 1 PB = 10^15 bytes = 1,000,000,000,000,000 bytes. PiB (pebibyte) is the IEC binary unit: 1 PiB = 2^50 bytes = 1,125,899,906,842,624 bytes. The two standards differ by about 12.6%, which is why a "1 PB" drive shows as ~0.888 PiB in an OS.

How do I convert petabytes per second to bits per second (Pbps)?

Multiply the PB/s value by 8,000,000,000,000,000 to get bits per second. For example, 1 PB/s = 8 Pbps (petabits per second). This tool handles static size conversions; for rate calculations, apply the same multiplier to your per-second figure.

Why does my OS show a different value than my cloud provider?

Cloud providers market capacity in SI petabytes (1 PB = 10^15 bytes). Most operating systems count storage in binary pebibytes (1 PiB = 2^50 bytes) but sometimes label the result "PB." Since 1 SI PB = ~0.888 PiB, a 1 PB bucket appears as ~0.888 PiB in your OS file manager.

Can JavaScript handle these large numbers accurately?

JavaScript uses 64-bit IEEE 754 floats, which represent integers exactly up to 2^53 (about 9 quadrillion). One PiB in bits is ~9 × 10^15, which sits just above that limit. For most practical inputs the precision is sufficient; for ultra-precise scientific work, use a dedicated big-number library.

Petabytes to Bits Converter

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

Enter a petabyte value and instantly see the equivalent in bits — SI decimal (PB) and IEC binary (PiB) both covered.

Input Value

Amount

Convert from

Quick Reference

1 PB (SI) = 8,000,000,000,000,000 bits
1 PiB (Binary) = 9,007,199,254,740,992 bits
1 PB/s = 8 Pbps

Results

Enter a value and click Convert to see results.

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Summary

Enter a petabyte value and instantly see the equivalent in bits — SI decimal (PB) and IEC binary (PiB) both covered.

How it works

Enter any number of petabytes in the input field.
Optionally change the "Convert from" unit if your value is in pebibytes (binary) rather than SI petabytes.
Click Convert (or press Enter) to calculate.
The converter multiplies by 10^15 (or 2^50 for PiB) to get bytes, then multiplies by 8 to get bits.
Copy any individual result using the copy icon next to it.

Use cases

Calculate total bit capacity of a petabyte-scale data lake for network planning.
Convert cloud storage quotas from petabytes to bits for bandwidth calculations.
Translate tape library capacity from PB to bits when working with low-level storage APIs.
Understand the difference between SI petabytes (vendor spec) and binary pebibytes (OS report).
Convert backbone link capacity from petabytes per second to bits per second (Pbps).
Verify storage sizing for data center migrations by cross-checking PB vs. raw bit counts.

Frequently Asked Questions

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