How to convert gigabytes to megabytes
To convert gigabytes (GB) to megabytes (MB), multiply the value in gigabytes by 1,000.
MB = GB × 1,000 (decimal)
MB = GB × 1,024 (binary)
Example: 5 GB = 5,000 MB, or 5,120 MB in binary.
Decimal (SI) counting steps by 1,000 and is what drive makers, macOS and phones use. Binary counting steps by 1,024 and is what Windows and RAM use; its unambiguous IEC names are KiB, MiB and GiB. Bits are decimal either way.
You can also type 5 GB to MB into the smart calculator, or mix units: 1 GB + 1 MB.
Gigabytes to Megabytes conversion table
| Gigabytes | Megabytes (decimal) | Megabytes (binary) |
|---|---|---|
| 0.01 GB | 10 MB | 10.24 MB |
| 0.1 GB | 100 MB | 102.4 MB |
| 0.25 GB | 250 MB | 256 MB |
| 0.5 GB | 500 MB | 512 MB |
| 1 GB | 1,000 MB | 1,024 MB |
| 2 GB | 2,000 MB | 2,048 MB |
| 3 GB | 3,000 MB | 3,072 MB |
| 4 GB | 4,000 MB | 4,096 MB |
| 5 GB | 5,000 MB | 5,120 MB |
| 6 GB | 6,000 MB | 6,144 MB |
| 7 GB | 7,000 MB | 7,168 MB |
| 8 GB | 8,000 MB | 8,192 MB |
| 9 GB | 9,000 MB | 9,216 MB |
| 10 GB | 10,000 MB | 10,240 MB |
| 12 GB | 12,000 MB | 12,288 MB |
| 15 GB | 15,000 MB | 15,360 MB |
| 20 GB | 20,000 MB | 20,480 MB |
| 25 GB | 25,000 MB | 25,600 MB |
| 30 GB | 30,000 MB | 30,720 MB |
| 40 GB | 40,000 MB | 40,960 MB |
| 50 GB | 50,000 MB | 51,200 MB |
| 60 GB | 60,000 MB | 61,440 MB |
| 75 GB | 75,000 MB | 76,800 MB |
| 100 GB | 100,000 MB | 102,400 MB |
| 250 GB | 250,000 MB | 256,000 MB |
| 500 GB | 500,000 MB | 512,000 MB |
| 1,000 GB | 1,000,000 MB | 1,024,000 MB |
Converting megabytes back to gigabytes
1 MB = 0.001 GB. See the Megabytes to Gigabytes converter, or press the swap button above.
About the units
Gigabyte (GB)
In decimal mode 1,000,000,000 bytes (1,000 MB); in binary mode 1,073,741,824 bytes (1,024 MB).
Megabyte (MB)
In decimal mode 1,000,000 bytes (1,000 KB); in binary mode 1,048,576 bytes (1,024 KB).
Digital storage is counted in bits and bytes (1 byte = 8 bits). There are two ways to count bytes. Decimal (SI) prefixes step by 1,000: 1 KB = 1,000 B and 1 GB = 1,000 MB, which is how drive makers, macOS, iOS and Android report sizes. Binary prefixes step by 1,024: 1 KB = 1,024 B and 1 GB = 1,024 MB, which is how Windows and RAM count (the IEC names for these are KiB, MiB and GiB). Bits are always decimal: 1 Kb = 1,000 b.
Questions and answers
How many megabytes are in a gigabyte?
One gigabyte (GB) equals 1,000 megabytes in decimal (SI) counting, or 1,024 megabytes in binary counting (1 KB = 1,024 B), which Windows uses.
How do I convert gigabytes to megabytes?
To convert gigabytes to megabytes, multiply the value in gigabytes by 1,000. The formula is MB = GB × 1,000. For example, 5 GB = 5,000 MB.
What is 5 GB in MB?
5 gigabytes is 5,000 megabytes.
Which is bigger, a gigabyte or a megabyte?
A gigabyte is bigger: 1 GB = 1,000 MB.
Is 1 GB equal to 1,000 MB or 1,024 MB?
Both are in use. In decimal (SI) counting, which drive makers, macOS, iOS and Android use, 1 GB = 1,000 MB. In binary counting, which Windows and RAM use, 1 GB = 1,024 MB; the unambiguous IEC name for that size is the gibibyte (GiB). ConvertEasy has a Decimal / Binary switch so KB, MB, GB and TB follow whichever you need, while KiB, MiB and GiB are always binary.
Are kilobits 1,000 or 1,024 bits?
ConvertEasy treats bits as decimal in both modes: 1 Kb = 1,000 b, 1 Mb = 1,000 Kb. A byte is always 8 bits, so only byte units (KB, MB, GB…) change with the switch.
Does this GB to MB converter work offline?
Yes. ConvertEasy is a progressive web app: after your first visit it keeps working with no connection, and you can install it to your home screen from the browser menu.