Convert bits to bytes
Convert bits to bytes instantly. 1 b = 0.125 B. Formula, worked examples and a quick reference table.
Last updated
One bit equals 0.125 bytes. To convert any number of bits to bytes, multiply by 0.125.
The converter above works in both directions and updates as you type. Below you will find the formula, a worked example and a reference table of common values.
Data conversions carry two ambiguities at once. Bits and bytes differ by a factor of eight, and network speeds are quoted in bits while file sizes are quoted in bytes — so a connection and a download will always report numbers that look inconsistent. On top of that, the same prefix means 1,000 to a drive manufacturer and 1,024 to an operating system, which is why advertised capacity and reported capacity never match. Neither is an error; they are different conventions wearing the same name.
bits to bytes formula
To go the other way, use bit = byte ÷ 0.125.
About these units
A byte is eight bits, historically the space needed for one character of text. Storage is measured in bytes; network speeds in bits.
Bit is also written bits. Byte is also written bytes.
Sources
bits to bytes conversion table
| Bit | Byte |
|---|---|
| 1 b | 0.125 B |
| 2 b | 0.25 B |
| 4 b | 0.5 B |
| 8 b | 1 B |
| 16 b | 2 B |
| 32 b | 4 B |
| 64 b | 8 B |
| 128 b | 16 B |
| 256 b | 32 B |
| 512 b | 64 B |
| 1,024 b | 128 B |
Frequently asked questions
How many bytes are in a bit? +
There are 0.125 bytes in one bit.
What is 10 b in B? +
10 b equals 1.25 B. Multiply 10 by 0.125.
How do I convert byte back to bit? +
Use bit = byte ÷ 0.125. The converter above handles both directions, or see our dedicated bytes to bits page.
How accurate is this bit to byte conversion? +
The factor used is 0.125, carried at full double precision. Where a unit has an exact legal definition the factor is exact rather than approximate. Rounding is applied only to the displayed result, so the answer is never a calculation done on an already-rounded number.
Is there a quick way to estimate b to B in my head? +
Divide by 8. That matches the true factor of 0.125 exactly, so no adjustment is needed for a mental estimate.