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MB to GB Converter (Megabytes to Gigabytes)

Convert Megabytes (MB) to Gigabytes (GB) and Mebibytes (MiB) to Gibibytes (GiB) instantly.

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How to Use the MB to GB Converter

1Enter the file size or storage quantity in Megabytes (MB).
2Choose your calculation base: Binary (1,024 MB = 1 GB) or Decimal (1,000 MB = 1 GB).
3The converter instantly displays the equivalent size in Gigabytes, Terabytes, and Kilobytes.
4Copy the formatted result with one click.

Formula & How It Works

Data Conversion Formula

GB (Binary) = MB / 1024 | GB (Decimal) = MB / 1000

In the binary system (RAM & OS storage), 1 GB = 1,024 MB. In the decimal SI standard (disk drive labeling), 1 GB = 1,000 MB.

Worked Examples

Standard OS Conversion

Input: 4,096 MB

Explanation: 4096 / 1024 = exactly 4.0 GB.

Result: 4.00 GB (or 4 GiB)

Large File Download

Input: 12,500 MB

Explanation: 12,500 / 1024 = 12.207 GB in Windows file explorer.

Result: 12.207 GB (Binary) / 12.5 GB (Decimal)

Frequently Asked Questions

Why does my 500 GB hard drive show as ~465 GB in Windows?▼

Hard drive manufacturers market drives in decimal units (1 GB = 1,000,000,000 bytes), but Windows computes drive capacity in binary Gibibytes (1 GiB = 1,073,741,824 bytes). 500 × (1000/1024)³ ≈ 465.66 GiB.

What is the difference between MB and Mb?▼

A capital 'B' stands for Bytes, while a lowercase 'b' stands for bits. 1 Byte = 8 bits, meaning 100 MB = 800 Mb.

Can I convert backwards from GB to MB?▼

Yes, click the swap button to convert Gigabytes directly into Megabytes.

Does it show Terabytes and Kilobytes as well?▼

Yes, a full multi-unit conversion breakdown is displayed.

Last reviewed & updated: 2026-03-29

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