Data Storage
Bytes, KB, MB and GB
Convert between bytes, kilobytes, megabytes and gigabytes — including the binary KiB/MiB/GiB units that differ from the decimal ones.
How this is calculated
- 1 KB = 1000 bytes, 1 MB = 1000 KB, 1 GB = 1000 MB
- 1 KiB = 1024 bytes, 1 MiB = 1024 KiB, 1 GiB = 1024 MiB
Drive manufacturers use the decimal units (1 GB = 1,000,000,000 bytes) while operating systems often report the binary ones. That gap is why a “1 TB” drive shows as roughly 931 GiB.
Checked against known values
- 1 GB = 1000 MB
- 1 MB = 1000000 B
- 1 GiB = 1024 MiB
- 1 GiB = 1073741824 B
- 1 GiB = 1.073742 GB