Convert between bits, bytes, kilobytes, megabytes, gigabytes, terabytes, and petabytes.
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Data Storage Reference
Decimal (SI)
1 KB= 1,000 bytes
1 MB= 1,000 KB
1 GB= 1,000 MB
1 TB= 1,000 GB
Binary (IEC)
1 KiB= 1,024 bytes
1 MiB= 1,024 KiB
1 GiB= 1,024 MiB
1 byte= 8 bits
FAQ
Drive manufacturers use decimal (1 TB = 1,000 GB), but operating systems often use binary (1 TiB = 1,024 GiB). A 1 TB drive appears as about 931 GiB in your OS. Some space is also used by the file system.
KB (kilobyte) is 1,000 bytes (decimal/SI standard). KiB (kibibyte) is 1,024 bytes (binary/IEC standard). The difference grows at larger scales: 1 GB = 1,000,000,000 bytes, but 1 GiB = 1,073,741,824 bytes.