What is kibibyte (binary)?
A kibibyte is a binary data unit equal to 1,024 bytes. It is the IEC-standard unit that precisely distinguishes binary-based kilobyte measurements from the decimal kilobyte used in storage marketing.
Real-world uses
Kibibytes are used in operating system kernels, Linux system tools, and technical documentation where binary precision matters. Memory allocations, filesystem block sizes, and network buffer sizes are specified in kibibytes to avoid decimal ambiguity. The Linux kernel, GNU tools, and JEDEC standards all use binary prefixes.
History
The kibibyte was defined by the International Electrotechnical Commission (IEC) in 1998 as part of IEC 80000-13 to resolve the longstanding ambiguity between decimal and binary multiples of bytes. The prefix "kibi-" derives from "kilo binary" (2^10 = 1,024).
Common mistakes
Confusing KiB (kibibyte, 1,024 bytes) with kB (kilobyte, 1,000 bytes). The difference is 2.4%, small but significant at scale. Many users and some software still use "kB" to mean 1,024 bytes despite the IEC 1998 standardisation of "KiB".
What is gibibyte (binary)?
A gibibyte is a binary data unit equal to 1,024 mebibytes, approximately 1.074 gigabytes. It is used by operating systems and technical documentation to express exact binary storage capacities.
Real-world uses
Gibibytes are used in operating systems, virtual machines, and technical contexts where binary accuracy is needed. macOS (since Catalina), Linux, and Windows all report file sizes and disk capacities in GiB in their file explorers. Virtual machine disk images, RAM allocations, and container storage limits are often specified in GiB.
History
The gibibyte was defined by the IEC in 1998. Prior to this, "gigabyte" was used inconsistently for both 10^9 and 2^30 bytes. The IEC standard clarified terminology, though marketing materials continue to use "GB" in the decimal sense, perpetuating consumer confusion.
Common mistakes
Confusing GiB (gibibyte, 1,073,741,824 bytes) with GB (gigabyte, 1,000,000,000 bytes). The difference is approximately 7.4%. A "1 TB" hard drive contains 1,000,000,000,000 bytes, which the OS displays as approximately 931 GiB, causing widespread confusion about "missing" storage.
When is this conversion used?
Operating systems and storage manufacturers use different base systems (binary vs decimal), which is why a '1 TB' drive shows less than 1 TB in your file manager. Understanding this conversion prevents confusion about available storage.
Worked examples
1 kibibyte (binary) = 9.536743e-07 gibibyte (binary)
1 gibibyte (binary) = 1.073742e+09 byte
How to convert kibibyte (binary) to gibibyte (binary)
To convert kibibyte (binary) to gibibyte (binary), multiply the value by 9.536743e-07.
To convert gibibyte (binary) back to kibibyte (binary), multiply by 1,048,576.
Measurement standards
The International Electrotechnical Commission (IEC 80000-13) defines binary prefixes: 1 KiB = 1,024 bytes, 1 MiB = 1,048,576 bytes. The SI decimal prefixes (kB = 1,000 bytes, MB = 1,000,000 bytes) apply to data units as they do to all SI quantities.
Did you know?
By 2025, the global datasphere is estimated to reach 181 zettabytes — roughly 181 trillion gigabytes. If stored on standard Blu-ray discs, the stack would reach from Earth to Mars and back over 20 times.
Quick reference: kibibyte (binary) to gibibyte (binary)
| kibibyte (binary) | gibibyte (binary) |
|---|---|
| 0.1 | 9.536743e-08 |
| 0.5 | 4.768372e-07 |
| 1 | 9.536743e-07 |
| 2 | 0.00000191 |
| 5 | 0.00000477 |
| 10 | 0.00000954 |
| 25 | 0.00002384 |
| 50 | 0.00004768 |
| 100 | 0.00009537 |
| 250 | 0.00023842 |
| 500 | 0.00047684 |
| 1,000 | 0.00095367 |
Common values
| kibibyte (binary) | gibibyte (binary) | |
|---|---|---|
| A text email | 4.8828125 kibibyte (binary) | 0.00000466 gibibyte (binary) |
| An MP3 song (4 min) | 3,906.25 kibibyte (binary) | 0.00372529 gibibyte (binary) |
| A smartphone photo | 4,882.8125 kibibyte (binary) | 0.00465661 gibibyte (binary) |
| An HD movie | 4,882,812.5 kibibyte (binary) | 4.65661287 gibibyte (binary) |
| A full hard drive | 976,562,500 kibibyte (binary) | 931.32257462 gibibyte (binary) |
Available Data units
More kibibyte (binary) conversions
- Convert kibibyte (binary) to byte
- Convert kibibyte (binary) to kilobyte (decimal)
- Convert kibibyte (binary) to megabyte (decimal)
- Convert kibibyte (binary) to gigabyte (decimal)
- Convert kibibyte (binary) to terabyte (decimal)
- Convert kibibyte (binary) to bit
- Convert kibibyte (binary) to mebibyte (binary)
- Convert kibibyte (binary) to gibibyte (binary)
- Convert kibibyte (binary) to tebibyte (binary)
Assumption: both decimal (kB, MB, GB, TB) and binary (KiB, MiB, GiB, TiB) units are included.