MB to GB Converter

Last updated: September 16, 2026

Megabytes and gigabytes measure digital storage and file sizes. In the decimal system used by storage makers and networks, 1 GB = 1000 MB; operating systems sometimes use the binary system where 1 GB = 1024 MB. The tool above lets you switch between the two.

How to convert megabytes to gigabytes

Divide the number of megabytes by 1000 (decimal), or by 1024 for the binary convention. The tool has a toggle for both.

To go the other way, use the Data Storage converter.

Step-by-step

1. Write down the value in megabytes (for example, 1000 MB).
2. Multiply it by 0.001.
3. The result is the value in gigabytes (1000 MB = 1 GB).
4. Round to the precision you need using the tool above.

Worked example

Convert 1000 megabytes to gigabytes:

So 1000 megabytes is 1 gigabytes.

Megabytes to gigabytes conversion table

Understanding your result

Whether you get the decimal or binary result depends on the convention you choose; the tool shows both. The math is exact within each convention.

Accuracy & limitations

This table uses the decimal (SI) convention: 1 GB = 1000 MB, as used by drive manufacturers and networks. In the binary convention (1 GB = 1024 MB), values are about 2.4% smaller — use the binary toggle in the tool.

Frequently asked questions

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