From bytes (B)
- Bytes to KilobytesB → kB
- Bytes to MegabytesB → MB
- Bytes to GigabytesB → GB
- Bytes to KibibytesB → KiB
Data Size conversion family
Data Size unit conversions
Digital information size in this family is expressed in bytes, where one byte is eight bits. Decimal SI prefixes and binary IEC prefixes are kept distinct.
Five named units
Unit and factor reference
| Unit | Symbol | Factor to base | Relationship | Definition and variant |
|---|---|---|---|---|
| byte | B | 1 | defined | A byte is eight bits for these conversions: 1 B = 8 bit. Named variant: Eight-bit byte. The base factor is exactly 1 by the family base-unit choice; the eight-bit byte relation is exact. |
| kilobyte | kB | 1000 | exact | A kilobyte uses the decimal SI prefix kilo: 1 kB = 1000 B exactly. Named variant: Decimal kilobyte; not kibibyte. The decimal-prefix relationship is exact. |
| megabyte | MB | 1000000 | exact | A megabyte uses the decimal SI prefix mega: 1 MB = 1000000 B exactly. Named variant: Decimal megabyte; not mebibyte. The decimal-prefix relationship is exact. |
| gigabyte | GB | 1000000000 | exact | A gigabyte uses the decimal SI prefix giga: 1 GB = 1000000000 B exactly. Named variant: Decimal gigabyte; not gibibyte. The decimal-prefix relationship is exact. |
| kibibyte | KiB | 1024 | exact | A kibibyte uses the IEC binary prefix kibi: 1 KiB = 2^10 B = 1024 B exactly. Named variant: IEC binary multiple; distinct from decimal kilobyte. The binary-prefix relationship is exact. |
Every ordered pair
All 20 data size calculators
From kilobytes (kB)
- Kilobytes to ByteskB → B
- Kilobytes to MegabyteskB → MB
- Kilobytes to GigabyteskB → GB
- Kilobytes to KibibyteskB → KiB
From megabytes (MB)
- Megabytes to BytesMB → B
- Megabytes to KilobytesMB → kB
- Megabytes to GigabytesMB → GB
- Megabytes to KibibytesMB → KiB
From gigabytes (GB)
- Gigabytes to BytesGB → B
- Gigabytes to KilobytesGB → kB
- Gigabytes to MegabytesGB → MB
- Gigabytes to KibibytesGB → KiB
From kibibytes (KiB)
- Kibibytes to BytesKiB → B
- Kibibytes to KilobytesKiB → kB
- Kibibytes to MegabytesKiB → MB
- Kibibytes to GigabytesKiB → GB
Evidence and review status
This family is machine-reviewed-pending-human. Automated checks verify structure, factor parity and source references; they do not constitute human or specialist approval.
Family assumptions and limits
- One byte is eight bits in this family; bit-rate and transfer-time conversions are outside scope.
- Kilobyte, megabyte, and gigabyte are decimal: 10^3, 10^6, and 10^9 bytes. Kibibyte is binary: 2^10 = 1024 bytes.
- This converter does not infer filesystem allocation, compression, metadata overhead, advertised device capacity, or usable formatted capacity.
- The arithmetic accepts non-negative scalar values, although actual stored byte counts are discrete integers.
- A conversion does not add significant figures to the source measurement.
Authoritative references
- The International System of Units (SI), 9th edition, version 4.01; Bureau International des Poids et Mesures; Cover (V4.01, June 2026); chapter 3, Table 7 on p. 138 defines kilo/mega/giga as powers of 10; pp. 139-140 state SI prefixes must not indicate powers of 2 and list kibi (Ki) = 2^10 with IEC 80000-13 as the detailed reference.; accessed 2026-08-07
- Definitions of the SI Units: The Binary Prefixes; National Institute of Standards and Technology; Prefixes for binary multiples and Examples and comparisons with SI prefixes: Ki = 2^10, one byte = 2^3 bits = 8 bits, one kibibit = 1024 bits, and one kilobit = 1000 bits.; accessed 2026-08-07
- NIST Special Publication 330, Section 3: Decimal Multiples and Submultiples of SI Units; National Institute of Standards and Technology; Table 7 and following note: SI prefixes are strictly powers of 10 and must not indicate powers of 2; Ki denotes 2^10.; accessed 2026-08-07