Megabytes to Petabytes
Type a value in either box to convert between megabytes and petabytes. The factor is 1e-09.
| Megabytes | Petabytes |
|---|---|
| 1 MB | 1e-09 PB |
| 2 MB | 2e-09 PB |
| 3 MB | 3e-09 PB |
| 5 MB | 5e-09 PB |
| 10 MB | 1e-08 PB |
| 25 MB | 2.5e-08 PB |
| 50 MB | 5e-08 PB |
| 100 MB | 1e-07 PB |
How to use
- Enter a value in the Megabytes field.
- The Petabytes figure appears immediately — no button to press.
- Typing in the Petabytes field converts back to Megabytes the same way.
- Use the reference table for the values that come up most often.
Megabytes to Petabytes formula
To convert megabytes to petabytes, multiply by 1e-09.
PB = MB × 1e-09
Why this factor: the megabyte and the petabyte are both defined against the byte, so dividing one definition by the other gives 1e-09 directly. Both definitions are set out in full below.
To go the other way, divide by 1e-09 — or use the Petabytes to Megabytes converter, which is the same calculation reversed.
Worked example
Given 64 MB, multiplying by 1e-09 yields 6.4e-08 PB.
64 MB × 1e-09 = 6.4e-08 PB
The converter above does this for any value you type, in either direction.
What is a megabyte?
A megabyte is one million bytes, the familiar unit for photos, songs and app sizes.
Definition: Exactly 1,000,000 bytes under SI prefixes. The binary mebibyte (MiB) is 1,048,576 bytes.
Where it is used: Photo and audio file sizes, app downloads, and mobile data allowances.
What is a petabyte?
A petabyte is a thousand terabytes — the scale of large-scale data infrastructure.
Definition: Exactly 1×10¹⁵ bytes under SI prefixes.
Where it is used: Data-centre and cloud storage footprints, scientific datasets, and media archives.
Megabytes vs Petabytes
The megabyte and the petabyte belong to the same family of units, so converting between them is usually a matter of shifting a decimal point or applying a small whole-number factor.
Frequently asked questions
How many petabytes are in a megabyte?
One megabyte equals 1e-09 petabytes.
What is the formula to convert megabytes to petabytes?
Multiply the number of megabytes by 1e-09. To reverse it, divide by 1e-09 instead.
How do I convert petabytes back to megabytes?
Divide by 1e-09, which is the same as multiplying by 1e+09.
How many petabytes are in 10 megabytes?
10 MB works out to 1e-08 PB.
How is the megabyte defined?
Exactly 1,000,000 bytes under SI prefixes. The binary mebibyte (MiB) is 1,048,576 bytes.