GB to MB Converter
1 gigabyte = 1,000 megabytes
Type a value in either box: the conversion between gigabytes (GB) and megabytes (MB) updates instantly.
Good to know
A single-layer DVD holds 4.7 GB, which is 4,700 MB in decimal units.
How to convert gigabytes to megabytes
To convert gigabytes to megabytes, multiply the number of gigabytes by 1,000. To go the other way, multiply megabytes by 0.001.
MB = GB × 1,000
Worked examples
- 1 GB = 1,000 MB
- 2 GB = 2,000 MB
- 4.7 GB = 4,700 MB
- 16 GB = 16,000 MB
GB to MB conversion table
| GB (GB) | MB (MB) |
|---|---|
| 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 |
| 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 |
| 75 GB | 75,000 MB |
| 100 GB | 100,000 MB |
| 250 GB | 250,000 MB |
| 500 GB | 500,000 MB |
| 1,000 GB | 1,000,000 MB |
About the units
GB (GB)
A gigabyte (GB) is 1,000,000,000 bytes, or 1,000 MB, in decimal units. Windows reports binary gibibytes (GiB, 1,073,741,824 bytes) but labels them GB.
MB (MB)
A megabyte (MB) is 1,000,000 bytes in the decimal (SI) system used by storage makers and networks. Some systems show 1,048,576 bytes (a mebibyte, MiB) as MB.
Frequently asked questions
How do I convert gigabytes to megabytes?
MB = GB × 1,000What is 2 GB in megabytes?
How many megabytes are in a gigabyte?
How many gigabytes are in a megabyte?
Conversion factors use exact international definitions where they exist (for example 1 inch = 2.54 cm and 1 lb = 0.45359237 kg). Results are rounded for display only.