Convert Petabyte to Gigabyte (PB → GB)

Converting petabytes to gigabytes is straightforward: multiply by the conversion factor. Follow these three steps to do it by hand or in your head.

1. 1
   Take your value in petabytes

   Start with the number of petabytes (PB) you want to convert.
2. 2
   Multiply by 1,000,000

   The conversion factor from PB to GB is 1,000,000. Multiply your value by this number.
3. 3
   Read the result in gigabytes

   The result is your value in gigabytes (GB).

Multiply the value in petabytes by 1,000,000. For the reverse direction, multiply by 0.000001.

• ✓1 PB = 1000 TB = 10¹⁵ B.
• ✓PiB uses binary multiples — rare in everyday context.
• ✓Scale beyond PB: EB (exabyte, 10¹⁸) and ZB (zettabyte, 10²¹).

• ✗Using PB when TB suffices — everyday use rarely needs PB.
• ✗Mixing PB and PiB — 12.6% difference.
• ✗Ignoring tape vs spinning-disk storage economics at PB scale.

What is the Petabyte?

The petabyte (PB) equals 1,000 terabytes (10¹⁵ bytes decimal) and rates large data centers, scientific research archives, and major social-media storage systems worldwide. The Large Hadron Collider generates about 30 petabytes of data per year, the U.S. Library of Congress digital collection is in the petabytes range, and major cloud-storage providers manage exabytes (1,000 PB) of data across their fleets. A petabyte could store roughly 250 million MP3 songs or about 13.3 years of HD video. The petabyte relates to the terabyte (1,000 TB = 1 PB), the exabyte (1,000 PB = 1 EB), and the gigabyte (10⁶ GB = 1 PB). Modern hyperscale data centers (Google, Amazon AWS, Microsoft Azure, Meta) store hundreds of petabytes per facility. The next consumer milestone — the petabyte hard drive — is expected within the next decade.

• Cloud-provider storage capacity
• Scientific datasets (CERN, genomics)
• Media archives and streaming libraries

What is the Gigabyte?

The gigabyte (GB) equals 1,000 megabytes (1,000,000,000 bytes decimal, or 1,073,741,824 bytes as GiB binary) and is the standard unit for smartphone storage, mobile data plans, and modern application sizes. Modern smartphones offer 64–1,024 GB of storage, mobile data plans range from 1 to 50+ GB per month, and operating-system installations typically require 20–80 GB. A 4K video stream consumes 6–8 GB per hour, and a typical app download is 50–500 MB to a few GB. The famous discrepancy between manufacturer-advertised capacity (GB decimal) and operating-system-displayed capacity (GiB binary) means a '1 TB' drive shows about 931 GB to the user. The gigabyte relates to the megabyte (1,000 MB = 1 GB), the terabyte (1,000 GB = 1 TB), the gibibyte (1 GiB = 1.074 GB), and the gigabit (1 GB = 8 Gbit).

• Phone and device storage
• Mobile-data plan allowances
• Memory (RAM) sizes