How many mebibytes are in a gibibyte?

1 gibibyte (GiB) = 1,024 mebibytes (MiB), exactly. Both use binary (base-2) prefixes defined by IEC 60027-2, so the conversion is always a power of 2: 2^10 = 1,024.

What is the difference between GiB and GB?

GiB (gibibyte) is a binary unit: 1 GiB = 1,024 MiB = 1,073,741,824 bytes. GB (gigabyte) is a decimal SI unit: 1 GB = 1,000 MB = 1,000,000,000 bytes. The difference is about 7.4%. Operating systems typically report in GiB but sometimes label it "GB", which causes apparent size discrepancies on storage devices.

Why does my hard drive show less space than advertised?

Drive manufacturers use decimal GB (1 GB = 1,000,000,000 bytes), but operating systems display in binary GiB (1 GiB = 1,073,741,824 bytes). A 500 GB drive contains about 465.66 GiB. This is not missing space — it is a unit labeling difference.

Is MiB to GiB conversion exact?

Yes. Because both units are binary, dividing MiB by 1,024 always yields an exact GiB value. No rounding or approximation is needed, unlike conversions between binary and decimal units.

Where are MiB and GiB used in practice?

RAM capacity, CPU cache sizes, virtual machine disk allocations, Linux partition tools (fdisk, GParted), and BIOS/UEFI memory maps all use MiB and GiB. Network bandwidth is typically decimal (MB/s, GB/s), so always confirm which prefix a tool uses.

Mebibytes to Gibibytes Converter

Name: Mebibytes to Gibibytes Converter
Availability: InStock
Author: Nham Vu

Enter a mebibyte value and instantly get the gibibyte result using the exact binary factor 1 GiB = 1,024 MiB.

MiB to GiB Converter

Mebibytes (MiB)

MiB

Binary (IEC 60027-2): 1 GiB = 1,024 MiB = 1,048,576 KiB = 1,073,741,824 bytes.

Enter mebibytes above to see the GiB result

Common Storage Sizes

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Description	MiB	GiB

Summary

Enter a mebibyte value and instantly get the gibibyte result using the exact binary factor 1 GiB = 1,024 MiB.

How it works

Enter a mebibyte (MiB) value in the input field — the result updates instantly.
The GiB result uses the exact binary factor: 1 GiB = 1,024 MiB.
The breakdown shows full gibibytes, remaining mebibytes, and the total in bytes.
Click any row in the reference table to load a common storage size.
Click "Clear" to reset the converter.

Use cases

Convert RAM capacity reported in MiB to GiB for system specs.
Verify that a 2,048 MiB allocation equals exactly 2 GiB.
Translate disk partition sizes between MiB and GiB in partitioning tools.
Check how many GiB a given MiB-reported cache or buffer occupies.
Compare memory readings between tools that use different binary prefixes.
Quickly determine the GiB equivalent of a firmware image size in MiB.

Frequently Asked Questions

Last updated: 2026-07-24 · Reviewed by Nham Vu