GB to MB Converter

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

Gigabytes

Megabytes

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 GB	500 MB
1 GB	1,000 MB
2 GB	2,000 MB
4 GB	4,000 MB
5 GB	5,000 MB
8 GB	8,000 MB
10 GB	10,000 MB
16 GB	16,000 MB
25 GB	25,000 MB
32 GB	32,000 MB
50 GB	50,000 MB
100 GB	100,000 MB
500 GB	500,000 MB

The gigabytes people look up most

1 GB = 1,000 MB: What the box says, counted the way the manufacturer counts it.
2 GB = 2,000 MB: A small mobile bundle, or roughly three hours of standard-definition streaming.
4 GB = 4,000 MB: Just above the FAT32 single-file ceiling, which is why large videos once had to be split.
8 GB = 8,000 MB: A dual-layer DVD, and a common memory module size.
16 GB = 16,000 MB: A phone storage tier, before the operating system takes its share.
64 GB = 64,000 MB: A mid-range phone, or a large camera card.

How the gb to mb 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 much mobile data does video streaming use?

Roughly 700 MB an hour for standard definition, 2,000 to 3,000 MB for HD and up to 7,000 MB for 4K. Audio is far cheaper at about 70 MB an hour. A 10 GB monthly bundle is three or four hours of HD video, or most of a month of podcasts and music.

Why can I not copy a 5 GB file to my USB stick?

Almost certainly because it is formatted FAT32, which cannot hold a single file of 4 GiB or more however much free space remains. It is still the default on many sticks because every device reads it. Reformatting to exFAT removes the limit while keeping broad compatibility across Windows, macOS and most televisions.

Why does RAM come in 8 and 16 GB rather than 10 or 20?

Because memory is addressed in binary, so capacities are powers of two. A module is built from chips whose address lines double at each step, which makes 8, 16 and 32 natural and 10 or 20 physically awkward. Disk storage has no such constraint, which is why drives are sold in round decimal sizes.

GB to MB Converter