Gigabytes to Megabytes Converter (gb to mb)
Enter a value in gigabytes to see it in megabytes instantly, or type in the megabytes box to convert the other way. 1 gigabyte = 1,000 megabytes, and 1 megabyte = 0.001 gigabytes.
Multiply gigabytes by 1,000 for decimal megabytes, or by 1,024 for binary. A 1.5 GB data plan is 1,500 MB; a 4 GiB memory stick is 4,096 MiB.
1 gigabyte = 1,000 megabytes. Formula: MB = GB × 1,000 (or GB ÷ 0.001)
1 gigabyte in all data units
| Bits (bit) | 8,000,000,000 |
| Bytes (B) | 1,000,000,000 |
| Kilobytes (KB) | 1,000,000 |
| Megabytes (MB) | 1,000 |
| Terabytes (TB) | 0.001 |
| Kibibytes (KiB) | 976,562.5 |
| Mebibytes (MiB) | 953.67432 |
| Gibibytes (GiB) | 0.93132257 |
| Tebibytes (TiB) | 0.0009094947 |
How to convert gigabytes to megabytes
MB = GB × 1,000
Multiply the number of gigabytes by 1,000. To convert megabytes back to gigabytes, multiply by 0.001, or divide by 1,000.
Example: 5 gigabytes × 1,000 = 5,000 megabytes.
Gigabytes to Megabytes conversion table
| Gigabytes | Megabytes |
|---|---|
| 1 GB | 1,000 MB |
| 2 GB | 2,000 MB |
| 3 GB | 3,000 MB |
| 4 GB | 4,000 MB |
| 5 GB | 5,000 MB |
| 6 GB | 6,000 MB |
| 7 GB | 7,000 MB |
| 8 GB | 8,000 MB |
| 9 GB | 9,000 MB |
| 10 GB | 10,000 MB |
| 12 GB | 12,000 MB |
| 15 GB | 15,000 MB |
| 20 GB | 20,000 MB |
| 25 GB | 25,000 MB |
| 30 GB | 30,000 MB |
| 40 GB | 40,000 MB |
| 50 GB | 50,000 MB |
| 60 GB | 60,000 MB |
| 70 GB | 70,000 MB |
| 75 GB | 75,000 MB |
| 80 GB | 80,000 MB |
| 90 GB | 90,000 MB |
| 100 GB | 100,000 MB |
| 200 GB | 200,000 MB |
| 250 GB | 250,000 MB |
| 500 GB | 500,000 MB |
| 1,000 GB | 1,000,000 MB |
| Megabytes | Gigabytes |
|---|---|
| 1 MB | 0.001 GB |
| 2 MB | 0.002 GB |
| 3 MB | 0.003 GB |
| 4 MB | 0.004 GB |
| 5 MB | 0.005 GB |
| 6 MB | 0.006 GB |
| 7 MB | 0.007 GB |
| 8 MB | 0.008 GB |
| 9 MB | 0.009 GB |
| 10 MB | 0.01 GB |
| 12 MB | 0.012 GB |
| 15 MB | 0.015 GB |
| 20 MB | 0.02 GB |
| 25 MB | 0.025 GB |
| 30 MB | 0.03 GB |
| 40 MB | 0.04 GB |
| 50 MB | 0.05 GB |
| 60 MB | 0.06 GB |
| 70 MB | 0.07 GB |
| 75 MB | 0.075 GB |
| 80 MB | 0.08 GB |
| 90 MB | 0.09 GB |
| 100 MB | 0.1 GB |
| 200 MB | 0.2 GB |
| 250 MB | 0.25 GB |
| 500 MB | 0.5 GB |
| 1,000 MB | 1 GB |
About the gigabyte and the megabyte
A gigabyte is one billion bytes. Phone storage, data plans and file downloads are quoted in gigabytes.
A megabyte is one million bytes in the decimal (SI) system used by storage makers and network speeds. Operating systems sometimes report mebibytes (1,048,576 bytes) under the same label.
Frequently asked questions
How many megabytes are in a gigabyte?
There are 1,000 megabytes in 1 gigabyte. For any number of gigabytes, multiply by 1,000.
How many gigabytes are in a megabyte?
1 megabyte = 0.001 gigabytes. To convert megabytes to gigabytes, multiply by 0.001 or divide by 1,000.
What is 5 gigabytes in megabytes?
5 gigabytes = 5,000 megabytes (5 × 1,000).
Is the gb to mb conversion exact?
Yes, once you know which system is in use. Decimal units (KB, MB, GB, TB) go up in steps of 1,000 as defined by the SI, and binary units (KiB, MiB, GiB, TiB) go up in steps of 1,024 as defined by the IEC. Storage makers and network speeds use decimal; Windows and some apps show binary values under decimal labels, which is why a 500 GB drive shows as about 465 GB.
Related calculators
Last updated . Formulas are shown on the page and checked against the worked example.
Conversion factors are exact international definitions where one exists and standard reference values elsewhere. Results are rounded to 8 significant digits.