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Gigabytes to Megabytes

If you need to know how many Megabytes one Gigabytes contains, the answer is 1,000. The conversion is linear, so 10 GB is 10,000 MB and 100 GB is 100,000 MB. Use the converter for any other value.

Formula 1 GB = 1,000 MB

Need the other direction? Megabytes to Gigabytes.

How to convert Gigabytes to Megabytes

A decimal gigabyte is 10^9 bytes; a gibibyte is 2^30 bytes. A decimal megabyte is 10^6 bytes; a mebibyte is 2^20 bytes.

To convert Gigabytes to Megabytes, multiply the value in GB by 1,000. For example, 10 GB × 1,000 = 10,000 MB. This works because the ratio between the two units is constant for every value in data storage.

Worked examples

GBMB
1 GB1,000 MB
2.5 GB2,500 MB
5 GB5,000 MB
10 GB10,000 MB
25 GB25,000 MB
50 GB50,000 MB
100 GB100,000 MB

Reverse conversion

MBGB
1 MB0.001 GB
5 MB0.005 GB
10 MB0.01 GB
25 MB0.025 GB
50 MB0.05 GB
100 MB0.1 GB

When this conversion is useful

This is the calculation you need when you are sizing a backup, a download or a storage plan and the units are mixed. Because the factor is fixed, you can use the same number for a single measurement or for a batch: 1,000 GB is 1,000,000 MB.

Is the conversion exact?

It depends on the definition. This converter uses decimal units (1 kB = 1,000 bytes) and a bit-based base; binary units such as KiB and GiB are separate units in the list.

Reference: BIPM SI Brochure and NIST SP 811. Last reviewed: 2026-11-01.

GB to MB conversion chart

The chart lists the most requested values. For a value that is not here, use the converter at the top of the page.

Gigabytes (GB)Megabytes (MB)
1 GB1,000 MB
2 GB2,000 MB
3 GB3,000 MB
4 GB4,000 MB
5 GB5,000 MB
6 GB6,000 MB
7 GB7,000 MB
8 GB8,000 MB
9 GB9,000 MB
10 GB10,000 MB
11 GB11,000 MB
12 GB12,000 MB
13 GB13,000 MB
14 GB14,000 MB
15 GB15,000 MB
16 GB16,000 MB
17 GB17,000 MB
18 GB18,000 MB
19 GB19,000 MB
20 GB20,000 MB
21 GB21,000 MB
22 GB22,000 MB
23 GB23,000 MB
24 GB24,000 MB
25 GB25,000 MB
26 GB26,000 MB
27 GB27,000 MB
28 GB28,000 MB
29 GB29,000 MB
30 GB30,000 MB
31 GB31,000 MB
32 GB32,000 MB
33 GB33,000 MB
34 GB34,000 MB
35 GB35,000 MB
36 GB36,000 MB
37 GB37,000 MB
38 GB38,000 MB
39 GB39,000 MB
40 GB40,000 MB
41 GB41,000 MB
42 GB42,000 MB
43 GB43,000 MB
44 GB44,000 MB
45 GB45,000 MB
46 GB46,000 MB
47 GB47,000 MB
48 GB48,000 MB
49 GB49,000 MB
50 GB50,000 MB
60 GB60,000 MB
70 GB70,000 MB
80 GB80,000 MB
90 GB90,000 MB
100 GB100,000 MB

Frequently asked questions

How many Megabytes are in 1 Gigabytes?

1 GB equals 1,000 MB.

How do I convert Gigabytes to Megabytes?

Multiply the GB value by 1,000. Example: 25 GB = 25,000 MB.

What is 2.5 GB in MB?

2.5 GB = 2,500 MB.

Is the GB to MB conversion exact?

It depends on the definition. This converter uses decimal units (1 kB = 1,000 bytes) and a bit-based base; binary units such as KiB and GiB are separate units in the list.

Does the calculator work offline?

Yes. The conversion runs in your browser with JavaScript, so it works after the page has loaded, even without a connection.

Related data storage conversions

TB → GBTerabytes to GigabytesGB → TBGigabytes to TerabytesMB → KBMegabytes to KilobytesKB → MBKilobytes to MegabytesGB → GiBGigabytes to GibibytesGiB → GBGibibytes to GigabytesKB → bitKilobytes to BitsMB → GBMegabytes to Gigabytes

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