Plain Math Tools

Bytes to KB

1 byte = 0.001 KB. 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 Bytes to KB conversions

Bytes	KB
1 byte	0.001
10 bytes	0.01
100 bytes	0.1
500 bytes	0.5
1,000 bytes	1
5,000 bytes	5
10,000 bytes	10
100,000 bytes	100
1,000,000 bytes	1,000

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.