Bits to Petabytes
An instant bits-to-petabytes converter, with the formula and a reference table below.
| Bits | Petabytes |
|---|---|
| 1 bit | 1.25e-16 PB |
| 2 bit | 2.5e-16 PB |
| 3 bit | 3.75e-16 PB |
| 5 bit | 6.25e-16 PB |
| 10 bit | 1.25e-15 PB |
| 25 bit | 3.125e-15 PB |
| 50 bit | 6.25e-15 PB |
| 100 bit | 1.25e-14 PB |
How to use
- Enter a value in the Bits field.
- The Petabytes figure appears immediately — no button to press.
- Typing in the Petabytes field converts back to Bits the same way.
- Use the reference table for the values that come up most often.
Bits to Petabytes formula
To convert bits to petabytes, multiply by 1.25e-16.
PB = bit × 1.25e-16
Why this factor: the bit and the petabyte are both defined against the byte, so dividing one definition by the other gives 1.25e-16 directly. Both definitions are set out in full below.
To go the other way, divide by 1.25e-16 — or use the Petabytes to Bits converter, which is the same calculation reversed.
Worked example
Start with 64 bit. Multiply by 1.25e-16 to get 8e-15 PB.
64 bit × 1.25e-16 = 8e-15 PB
The converter above does this for any value you type, in either direction.
What is a bit?
A bit is the smallest unit of digital information — a single binary digit, either 0 or 1.
Definition: One eighth of a byte. The name is a contraction of 'binary digit'.
Where it is used: Network and connection speeds, which are always quoted in bits per second.
Worth knowing: Lowercase 'b' is bits, uppercase 'B' is bytes. A 100 Mb/s connection delivers about 12.5 MB/s.
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.
Bits vs Petabytes
The bit 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 bit?
One bit equals 1.25e-16 petabytes.
What is the formula to convert bits to petabytes?
Multiply the number of bits by 1.25e-16. To reverse it, divide by 1.25e-16 instead.
How do I convert petabytes back to bits?
Divide by 1.25e-16, which is the same as multiplying by 8e+15.
How many petabytes are in 10 bits?
10 bit works out to 1.25e-15 PB.
Is there anything to watch out for with bits?
Lowercase 'b' is bits, uppercase 'B' is bytes. A 100 Mb/s connection delivers about 12.5 MB/s.
How is the bit defined?
One eighth of a byte. The name is a contraction of 'binary digit'.