Convert Megabyte to Petabyte (MB → PB)

Converting megabytes to petabytes 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 megabytes

   Start with the number of megabytes (MB) you want to convert.
2. 2
   Multiply by 1 × 10^-9

   The conversion factor from MB to PB is 1 × 10^-9. Multiply your value by this number.
3. 3
   Read the result in petabytes

   The result is your value in petabytes (PB).

Multiply the value in megabytes by 1 × 10^-9. For the reverse direction, multiply by 1,000,000,000.

• ✓SI: 1 MB = 1000 KB = 1,000,000 B.
• ✓Binary MiB = 1,048,576 B — 4.86% larger.
• ✓HD drives, networks, SSDs: SI MB.

• ✗Mixing MB and MiB without noting the difference (~5%).
• ✗Confusing MB (storage) with Mb (megabit, 1/8).
• ✗Assuming 1 GB = 1000 MB always — correct in SI; binary it's 1024.

What is the Megabyte?

The megabyte (MB) equals 1,000 kilobytes (1,000,000 bytes decimal, or 1,048,576 bytes binary as MiB). It is the everyday unit for image files, MP3 songs, and small documents on personal computers. A high-quality JPEG photograph is 2–10 MB, an MP3 song is 3–10 MB, a Microsoft Word document might be 0.05–5 MB, and a typical e-book is under 5 MB. Older USB flash drives and CDs hold hundreds of MB (a CD is 700 MB). Mobile data plans were originally measured in MB before gigabyte plans became standard. The megabyte relates to the kilobyte (1,000 KB = 1 MB), the gigabyte (1,000 MB = 1 GB), and the megabit (1 MB = 8 Mbit). Internet connection speeds are usually rated in Mbps (megabits per second), distinct from MBps (megabytes per second): 100 Mbps = 12.5 MBps.

• Photo and image file sizes
• MP3 and audio files
• Small video clips

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