Convert bytes to bits
Convert bytes to bits instantly. 1 B = 8 b. Formula, worked examples and a quick reference table.
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One byte equals 8 bits. To convert any number of bytes to bits, multiply by 8.
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.
bytes to bits formula
To go the other way, use byte = bit ÷ 8.
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.
Byte is also written bytes. Bit is also written bits.
Sources
bytes to bits conversion table
| Byte | Bit |
|---|---|
| 1 B | 8 b |
| 2 B | 16 b |
| 4 B | 32 b |
| 8 B | 64 b |
| 16 B | 128 b |
| 32 B | 256 b |
| 64 B | 512 b |
| 128 B | 1,024 b |
| 256 B | 2,048 b |
| 512 B | 4,096 b |
| 1,024 B | 8,192 b |
Frequently asked questions
How many bits are in a byte? +
There are 8 bits in one byte.
What is 10 B in b? +
10 B equals 80 b. Multiply 10 by 8.
How do I convert bit back to byte? +
Use byte = bit ÷ 8. The converter above handles both directions, or see our dedicated bits to bytes page.
How accurate is this byte to bit conversion? +
The factor used is 8, 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? +
Multiply by 8. That matches the true factor of 8 exactly, so no adjustment is needed for a mental estimate.