Gigabytes to megabytes
1 gigabyte = 1,000 megabytes
Type a value in gigabytes (GB) to get megabytes (MB) straight away. A gigabyte is larger than a megabyte, so the number goes up. Both units belong to data storage, measured here against the byte.
1 GB = 1,000 MB
Formula
MB = GB × 1,000
One gigabyte is 1,000 megabytes, so multiply the gigabyte value by that factor. Here GB is the value in gigabytes and MB is the result in megabytes.
Worked example: 64 gigabytes × 1,000 = 64,000 megabytes.
Gigabytes to megabytes table
| gigabytes (GB) | megabytes (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 |
| 60 GB | 60,000 MB |
| 75 GB | 75,000 MB |
| 100 GB | 100,000 MB |
Everyday gigabytes in megabytes
| What it is | GB | MB |
|---|---|---|
| an hour of SD video (about) | 1 GB | 1,000 MB |
| a single-layer DVD | 4.7 GB | 4,700 MB |
| a phone's base storage | 64 GB | 64,000 MB |
| a laptop SSD | 256 GB | 256,000 MB |
| 1 TB drive | 1,000 GB | 1,000,000 MB |
Quick estimate in your head
Multiply by 10^3: move the decimal point 3 places right (add 3 zeros).
Watch out for
- Drive makers use decimal GB (10⁹ bytes), while Windows reports binary GiB but labels it GB. A 256 GB drive shows about 238 'GB'.
About the units
Gigabyte (GB). 1,000,000,000 bytes (decimal). Phone storage and data plans are sold in GB.
Megabyte (MB). 1,000,000 bytes (decimal). Windows shows MiB values but labels them MB.
Going the other way, 1 megabyte is 0.001 gigabytes.
Questions
How many megabytes are in 1 gigabyte?
1 gigabyte is 1,000 megabytes, and 1 megabyte is 0.001 gigabytes.
How do I convert gigabytes to megabytes?
Use MB = GB × 1,000. For example, 64 gigabytes × 1,000 = 64,000 megabytes.
Why does my drive show less space than advertised?
Makers use decimal units (1 GB = 10⁹ bytes) while many operating systems count in binary (1 GiB = 2³⁰ bytes). A 1 TB drive therefore shows about 931 GiB.
How much is 1 TB drive in megabytes?
1,000 GB is 1,000,000 MB.
Source for the conversion factor: NIST: prefixes for binary multiples (IEC 80000-13).
Related conversions
- megabytes to gigabytes
- gigabytes to terabytes
- kilobytes to megabytes
- megabytes to kilobytes
- gigabytes to gibibytes
- megabytes to mebibytes