What is mebibyte (binary)?
A mebibyte is a binary data unit equal to 1,024 kibibytes, or 1,048,576 bytes. It is used in operating systems, RAM specifications, and software contexts where exact binary data sizes are required.
Real-world uses
Mebibytes are used by operating systems when reporting RAM size and filesystem usage. Windows Task Manager and Linux tools such as "free" and "df" report memory in MiB. RAM sticks are specified in binary multiples; a "4 GB" RAM module is actually 4 GiB = 4,096 MiB.
History
The mebibyte was standardised by the IEC in 1998 alongside the kibibyte and gibibyte to eliminate the ambiguity created by the historical use of "megabyte" to mean either 1,000,000 or 1,048,576 bytes. Adoption has been gradual, with the Linux kernel and many technical tools now using MiB correctly.
Common mistakes
Confusing MiB (mebibyte, 1,048,576 bytes) with MB (megabyte, 1,000,000 bytes). A mebibyte is approximately 4.86% larger than a megabyte. Software that reports in MiB may appear to show less space than marketing specifications that use MB.
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 mebibyte (binary) = 0.00097656 gibibyte (binary)
1 gibibyte (binary) = 1.073742e+09 byte
How to convert mebibyte (binary) to gibibyte (binary)
To convert mebibyte (binary) to gibibyte (binary), multiply the value by 0.00097656.
To convert gibibyte (binary) back to mebibyte (binary), multiply by 1,024.
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: mebibyte (binary) to gibibyte (binary)
| mebibyte (binary) | gibibyte (binary) |
|---|---|
| 0.1 | 0.00009766 |
| 0.5 | 0.00048828 |
| 1 | 0.00097656 |
| 2 | 0.00195312 |
| 5 | 0.00488281 |
| 10 | 0.00976562 |
| 25 | 0.02441406 |
| 50 | 0.04882812 |
| 100 | 0.09765625 |
| 250 | 0.24414062 |
| 500 | 0.48828125 |
| 1,000 | 0.9765625 |
Common values
| mebibyte (binary) | gibibyte (binary) | |
|---|---|---|
| A text email | 0.00476837 mebibyte (binary) | 0.00000466 gibibyte (binary) |
| An MP3 song (4 min) | 3.81469727 mebibyte (binary) | 0.00372529 gibibyte (binary) |
| A smartphone photo | 4.76837158 mebibyte (binary) | 0.00465661 gibibyte (binary) |
| An HD movie | 4,768.37158203 mebibyte (binary) | 4.65661287 gibibyte (binary) |
| A full hard drive | 953,674.31640625 mebibyte (binary) | 931.32257462 gibibyte (binary) |
Available Data units
More mebibyte (binary) conversions
- Convert mebibyte (binary) to byte
- Convert mebibyte (binary) to kilobyte (decimal)
- Convert mebibyte (binary) to megabyte (decimal)
- Convert mebibyte (binary) to gigabyte (decimal)
- Convert mebibyte (binary) to terabyte (decimal)
- Convert mebibyte (binary) to bit
- Convert mebibyte (binary) to kibibyte (binary)
- Convert mebibyte (binary) to gibibyte (binary)
- Convert mebibyte (binary) to tebibyte (binary)
Assumption: both decimal (kB, MB, GB, TB) and binary (KiB, MiB, GiB, TiB) units are included.