Plain Math Tools

GiB to GB

1 GiB = 1.073741824 GB. 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?

Windows will show about

How long will a download take?

At full speed it takes

Common GiB to GB conversions

GiBGB
1 GiB1.073741824
2 GiB2.147483648
5 GiB5.36870912
10 GiB10.73741824
25 GiB26.8435456
50 GiB53.6870912
100 GiB107.3741824
250 GiB268.435456
500 GiB536.870912

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.