How many gigabytes are in a mebibyte?

1 mebibyte (MiB) = 1,048,576 bytes. Divided by 1,000,000,000 bytes per gigabyte gives exactly 0.001048576 GB. So 1,000 MiB = 1.048576 GB.

What is a mebibyte (MiB)?

A mebibyte is an IEC binary unit equal to 2^20 bytes, which is exactly 1,048,576 bytes or 1,024 kibibytes. It is often used by operating systems, file systems, and RAM specifications to avoid ambiguity with the SI megabyte (1 MB = 1,000,000 bytes).

What is the difference between MiB and MB?

1 MiB (mebibyte) = 1,048,576 bytes. 1 MB (megabyte, SI) = 1,000,000 bytes. A mebibyte is about 4.86% larger than a megabyte. The difference compounds at higher scales, which is why a "500 GB" hard drive shows as about 476 GiB in your OS.

How do I convert MiB to GiB?

Divide the MiB value by 1,024. For example, 2,048 MiB = 2,048 ÷ 1,024 = 2 GiB. This is a clean binary division because both units are powers of 2.

Why is the MiB-to-GB factor not a round number?

Because MiB is a binary unit (power of 2) and GB is a decimal unit (power of 10). 1 MiB = 2^20 bytes and 1 GB = 10^9 bytes. Their ratio, 2^20 / 10^9 = 0.001048576, cannot be expressed as a simple fraction in either base.

Mebibytes to Gigabytes Converter

Enter a mebibyte value and instantly get gigabytes (GB) using the exact factor 1 MiB = 0.001048576 GB, plus gibibytes (GiB) for reference.

Input — Mebibytes (MiB)

Number of mebibytes

Conversion factor: 1 MiB = 1,048,576 bytes = 0.001048576 GB (SI decimal). In binary: 1 MiB = 1/1,024 GiB.

Results

Enter a MiB value and click Convert.

Reference Table — Common MiB Values

Quick lookup for typical storage and memory sizes in mebibytes.

MiB	GB (SI, ÷10⁹)	GiB (binary, ÷2³⁰)	Typical example

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Summary

This tool converts mebibytes (MiB) to gigabytes (GB) using the exact decimal factor: 1 MiB = 1,048,576 bytes = 0.001048576 GB. Mebibytes are the IEC binary unit defined as 2^20 bytes, while gigabytes are the SI decimal unit defined as 10^9 bytes. Because the two systems use different bases, the conversion factor is not a round number. The tool also shows the result in gibibytes (GiB), the IEC binary unit equal to 2^30 bytes, where the conversion is simply MiB ÷ 1,024.

How it works

Enter the number of mebibytes (MiB) in the input field.
The tool multiplies by 1,048,576 to get the exact byte count.
It then divides by 1,000,000,000 to get decimal gigabytes (GB).
It also divides the MiB value by 1,024 to get binary gibibytes (GiB).
Results appear instantly with up to 10 significant digits.
Use the copy buttons to grab any result value.

Use cases

Convert RAM or cache sizes reported in MiB to the GB advertised by hardware vendors.
Translate file system block sizes from MiB into gigabytes for storage planning.
Understand why a 512 MiB buffer equals 0.536871 GB, not exactly 0.5 GB.
Cross-check operating system memory reports (in MiB) against product specs (in GB).
Calculate data transfer sizes in GB from MiB figures in network or disk benchmarks.
Convert log or database partition sizes from MiB to GB for capacity planning.

Frequently Asked Questions

Last updated: 2026-06-19 · Reviewed by Nham Vu