1 Mebibyte equals 1,024 Kibibytes.
| Mebibyte (MiB) | Kibibyte (KiB) |
|---|---|
| 1 MiB | 1,024 KiB |
| 2 MiB | 2,048 KiB |
| 4 MiB | 4,096 KiB |
| 8 MiB | 8,192 KiB |
| 16 MiB | 16,384 KiB |
| 32 MiB | 32,768 KiB |
| 64 MiB | 65,536 KiB |
| 128 MiB | 131,072 KiB |
| 256 MiB | 262,144 KiB |
| 512 MiB | 524,288 KiB |
| 1,024 MiB | 1,048,580 KiB |
| 2,048 MiB | 2,097,150 KiB |
To convert Mebibytes to Kibibytes, multiply the value by 1,024. This factor comes from the ratio of the two units' definitions: one Mebibyte equals 1,024 Kibibytes.
For example: 1 Mebibyte = 1,024 Kibibytes, and 10 Mebibytes = 10,240 Kibibytes.
To convert in the reverse direction — from Kibibytes to Mebibytes — multiply by 0.000976563.
A mebibyte (MiB) equals exactly 1,048,576 bytes (2²⁰ bytes), compared to the SI megabyte (MB) of exactly 1,000,000 bytes. The "mebi" prefix comes from the IEC 1998 standard, blending "mega" and "binary." The mebibyte is 1,024 kibibytes, and 1,024 mebibytes make one gibibyte. The difference between 1 MiB and 1 MB is about 4.9% — small for individual files but accumulating into significant discrepancies at larger scales.
Software developers and system administrators working with RAM, CPU caches, and binary-structured file systems prefer mebibytes because these systems allocate memory in powers of 2. A process allocated "512 MiB of RAM" has exactly 536,870,912 bytes, making memory arithmetic exact. Kernel developers, embedded systems programmers, and network engineers who think in binary naturally tend to use MiB when precision matters.
The mebibyte is the correct notation for the "MB" shown by operating systems like Windows when reporting RAM: Windows 10 reports a system with 8 "GB" of RAM as using "8192 MB" in Task Manager — but these are mebibytes (MiB), not megabytes (MB), even though the display says "MB." A truly metric 8 GB of RAM would be 8,000 MB = 7,629 MiB. This is why a newly formatted "8 GB" USB drive shows up as about 7.4 GiB of usable space in Windows.
A kibibyte (KiB) equals exactly 1,024 bytes (2¹⁰ bytes). The prefix "kibi" was created by the International Electrotechnical Commission (IEC) in 1998 specifically to distinguish binary multiples (powers of 2) from decimal SI multiples (powers of 10). The kibibyte exists because computing naturally works in binary — memory addresses, data bus widths, and cache lines all come in powers of 2 — so 1,024 bytes is a more natural grouping in hardware than 1,000 bytes.
Before the IEC standardized "kibibyte," computing used "kilobyte" to mean 1,024 bytes, while storage manufacturers used "kilobyte" to mean 1,000 bytes. This ambiguity caused persistent confusion: a floppy disk advertised as "1.44 MB" actually stored 1,474,560 bytes — which is 1,474.56 kB (decimal) but 1,440 KiB (binary), and the "1.44" came from a confusing mix of both systems. The kibibyte notation resolves this by clearly distinguishing the binary context.
Operating systems that report file sizes in kibibytes (correctly labeled) include many Linux distributions, which show file sizes in KiB when using the `--si` flag distinction. Programming documentation increasingly uses KiB for technical precision, though consumer products and Windows still use "KB" to mean 1,024 bytes, perpetuating the ambiguity. For practical purposes, the difference between 1 KiB (1,024 B) and 1 kB (1,000 B) is only 2.4% — negligible in everyday use but worth tracking in technical specification and billing contexts.
1 Mebibyte equals 1,024 Kibibytes.
To convert Mebibytes to Kibibytes, multiply by 1,024. For example, 0.1 Mebibytes = 102.4 Kibibytes.
1 Kibibyte equals 0.000976563 Mebibytes.