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UnitCalculators.com

Bytes to bits

Multiply bytes by 8 to get bits.

1 B = 8 bitIEC 80000-13
B
128bit

16 B = 128 bit

How to convert bytes to bits

The bit is a single binary digit; eight bits make one byte. The byte is eight bits — the basic unit of digital storage.

Worked example — 16 B: 16 × 8 = 128 bit.

Bytes to bits table

Common conversions. The reverse table is on bits to bytes.
BytesBits
1 B8 bit
2 B16 bit
4 B32 bit
8 B64 bit
16 B128 bit
32 B256 bit
64 B512 bit
128 B1,024 bit
1,024 B8,192 bit

Reverse and related

About bytes and bits

Byte (B)

1 B = 8 bit

Definition. Eight bits — the basic unit of digital storage

History and origin

The byte was named in 1956 by Werner Buchholz at IBM, during the design of the Stretch computer, for the group of bits needed to encode one character — respelled from bite so it could not be confused with bit. Eight bits became the standard with the System/360 in the 1960s, giving 256 possible values.

Current use

The byte is the basic unit for file sizes and memory; storage and documents are measured in bytes and their multiples.

Source: IEC 80000-13 (quantities and units — information science); NIST on binary prefixes

Bit (bit)

1 bit = 0.125 B

Definition. A single binary digit; eight bits make one byte

History and origin

The bit, short for binary digit, was named by the statistician John Tukey and popularised by Claude Shannon in his 1948 work founding information theory. It represents a single 0 or 1.

Current use

Bits are used to measure information and, most visibly, network and connection speeds, which are quoted in bits per second.

Source: IEC 80000-13 (quantities and units — information science); NIST on binary prefixes

Where people use this

Bytes: file sizes, memory. Bits: network and connection speeds, encoding. 1 byte is exactly 8 bits.

How we know this is right
The factor is fixed by the standards that define the units, not chosen — so it is exact, not a measurement:
1 bit = 0.125 B, so 1 B = 1 ÷ 0.125 = 8 bit.

Every value is carried to full double precision; the display is rounded.

Both units are defined in IEC 80000-13 (quantities and units — information science); NIST on binary prefixes.

Questions people ask

How many bits in a byte?

One byte is exactly 8 bits.

How many bits is 10 bytes?

10 bytes is 80 bits.

Why is a byte 8 bits?

Eight bits became the standard byte with the IBM System/360, giving 256 possible values.

All byte conversions