Plain Math Tools

Bits to Bytes

1 bit = 0.125 bytes. 8 bits make 1 byte. Enter any amount below to convert it.

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Decimal (drives, networks, macOS)

Binary (Windows, RAM)

Bits (connection speeds)

Why does my drive look smaller?

Size on the box

Unit

Windows will show about

How long will a download take?

File size

Unit

Connection speed

Unit

At full speed it takes

Common Bits to Bytes conversions

Bits	Bytes
1 bit	0.125
10 bits	1.25
100 bits	12.5
500 bits	62.5
1,000 bits	125
5,000 bits	625
10,000 bits	1,250
100,000 bits	12,500
1,000,000 bits	125,000

Decimal units count in thousands (1 GB = 1,000 MB). Binary units count in 1,024s (1 GiB = 1,024 MiB). Windows uses binary but labels it KB, MB and GB, which is why the same file or drive can show two different sizes.

Speeds are in bits: 8 bits make a byte, so a 100 Mbps connection moves at most 12.5 MB per second. Real downloads usually run somewhat slower than the advertised speed.