Plain Math Tools

Bytes to GB

1 byte = 0.000000001 GB. Enter any amount below to convert it.

Private by design. Everything is worked out in your browser. Nothing is sent or saved.

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 GB conversions

Bytes	GB
1 byte	0.000000001
10 bytes	0.00000001
100 bytes	0.0000001
500 bytes	0.0000005
1,000 bytes	0.000001
5,000 bytes	0.000005
10,000 bytes	0.00001
100,000 bytes	0.0001
1,000,000 bytes	0.001

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.