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GB to MB Converter

Convert gigabytes to megabytes instantly, with a reference table for data plans, uploads and file limits.

GB to MB Converter

1 GB = 1,000 MB

Multiply gigabytes by 1,000 to get megabytes.

The link carries the values you entered, so whoever opens it sees the same result. Nothing is stored on our side — the numbers travel in the link itself.

Gigabytes to megabytes reference table

The conversions people look up most often, rounded to 2 decimal places.

Common gigabytes to megabytes conversions
Gigabyte (GB)Megabyte (MB)
0.5 GB500 MB
1 GB1,000 MB
2 GB2,000 MB
4 GB4,000 MB
5 GB5,000 MB
8 GB8,000 MB
10 GB10,000 MB
16 GB16,000 MB
25 GB25,000 MB
32 GB32,000 MB
50 GB50,000 MB
100 GB100,000 MB
500 GB500,000 MB

How the gb to mb converter calculation works

Using the decimal definition, 1 GB = 1,000 MB:

megabytes = gigabytes × 1000

If you need the binary figure that Windows displays, multiply by 1,024 instead — 1 GiB is 1,024 MiB. Which one is right depends entirely on who wrote the number you are converting.

Common sizes:

  • 1 GB → 1,000 MB
  • 5 GB → 5,000 MB
  • 25 GB → 25,000 MB (a typical mobile plan)
  • 50 GB → 50,000 MB (a Blu-ray disc)

Where the conversion is actually needed:

Email attachment limits are quoted in MB — Gmail allows 25 MB, most corporate servers 10–20 MB. A 1 GB video is 1,000 MB, forty times over the limit, which is why large files go via a link rather than an attachment.

Mobile data. Carriers bill in GB but apps report usage in MB. Streaming video runs roughly 1 GB per hour at 1080p and about 3 GB per hour at 4K — so a 25 GB plan is around 25 hours of HD or 8 hours of 4K.

Upload caps. Many platforms cap uploads in MB while users think in GB: a 500 MB limit is half a gigabyte, and a 2 GB file is four times over.

Note the bit/byte distinction too. Broadband is sold in megabits per second (Mbps), not megabytes. Divide by 8: a 100 Mbps connection transfers about 12.5 MB per second, so a 1 GB file takes roughly 80 seconds at full speed.

Frequently asked questions

How do I convert gigabytes to megabytes?

Multiply the number of gigabytes by 1000 to get megabytes.

How many megabytes are in 5 GB?

5 GB equals 5000.00 MB. The reference table on this page lists the other values people look up most often.

How do I convert megabytes back to gigabytes?

Divide the number of megabytes by 1000, or use the swap control on the converter above.

Is this conversion exact?

Yes. The factor is fixed by international definition rather than measured, so the conversion is exact - only the displayed rounding limits precision.

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