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Convert GB to MB

A practical reference for converting gigabytes (GB) to megabytes (MB), a data unit. Type any value for an instant result, or use the reference table below.

1 GB = 1,024 MB
MB = GB × 1024
1,024 MB

Conversion formula

MB = GB × 1024

This page uses the binary convention where 1 GB = 1024 MB. Storage vendors often use the decimal 1 GB = 1000 MB.

Quick reference table

gigabytesmegabytes
0.5 GB512 MB
1 GB1,024 MB
2 GB2,048 MB
4 GB4,096 MB
8 GB8,192 MB
16 GB16,384 MB
32 GB32,768 MB
64 GB65,536 MB
128 GB131,072 MB
256 GB262,144 MB

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Frequently asked questions

How many MB is 1 GB?

1 GB equals 1,024 MB.

Why does my result differ slightly from other sites?

Rounding. This page displays four decimal places while the underlying calculation keeps full precision.

Is my input sent to a server?

No. Every calculation runs locally in your browser and nothing is transmitted.

All calculations on this page run in your browser. Your input is never sent to a server.

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