Gigabyte to Megabyte Converter
One Gigabyte equals 1024 Megabyte (1 GB = 1024 MB). Multiply a Gigabyte value by 1024 to get the equivalent in Megabyte. Use the calculator above for instant results, or follow the formula, worked examples, and reference table below.
Formula
MB = GB × 1024
Multiply the Gigabyte value by 1024 to get the equivalent value in Megabyte.
Example Conversions
1 Gigabyte (GB)
1024 Megabyte (MB)
5 Gigabyte (GB)
5120 Megabyte (MB)
10 Gigabyte (GB)
10240 Megabyte (MB)
25 Gigabyte (GB)
25600 Megabyte (MB)
100 Gigabyte (GB)
102400 Megabyte (MB)
Conversion Table
| Gigabyte (GB) | Megabyte (MB) |
|---|---|
| 0.1 | 102.4 |
| 0.5 | 512 |
| 1 | 1024 |
| 2 | 2048 |
| 5 | 5120 |
| 10 | 10240 |
| 25 | 25600 |
| 50 | 51200 |
| 100 | 102400 |
| 250 | 256000 |
| 500 | 512000 |
| 1000 | 1024000 |
How to Convert Manually
Use these steps to convert Gigabyte values to Megabyte without the calculator.
- Write down the value in Gigabyte (GB) that you want to convert.
- Multiply that value by 1024.
- For example, 10 Gigabyte × 1024 = 10240 Megabyte.
- Label the result as Megabyte (MB).
Relative Size Comparison
This chart shows the visual difference in size between exactly one Gigabyte and one Megabyte.
About Gigabyte and Megabyte
The gigabyte here is 1,024 megabytes, about a billion bytes. RAM, phone storage, and mobile data plans are sold in gigabytes. The megabyte here is 1,024 kilobytes, about a million bytes. Photos, songs, and app downloads are typically measured in megabytes. One Gigabyte equals 1024 Megabyte (1 GB = 1024 MB). Gigabyte to Megabyte conversion comes up most often in phone and laptop storage and in RAM capacity, typically when figures need restating for photo and music file sizes.
Precision and Rounding: This converter uses the binary convention (1 KB = 1,024 bytes), which matches how operating systems report file and memory sizes. Storage manufacturers label drives with decimal units (1 GB = 1,000,000,000 bytes), which is why a '1 TB' drive shows roughly 931 GB in your OS — check which convention your source uses.
Conversion factors per NIST Special Publication 811 and the BIPM SI Brochure (9th edition) (reference).
Worked Example
15 Gigabyte equals 15360 Megabyte.
15 GB × 1024 = 15360 MB
FAQ
How do I convert Gigabyte to Megabyte?
Multiply the Gigabyte value by 1024 to get the equivalent value in Megabyte.
What is the formula for Gigabyte to Megabyte?
The formula is MB = GB × 1024.
How many Megabyte are in 1 Gigabyte?
1 Gigabyte equals 1024 Megabyte.
Can I convert Megabyte back to Gigabyte?
Yes. 1 Megabyte equals 0.0009765625 Gigabyte, and the related converter can reverse the calculation.
What are common names for Gigabyte and Megabyte?
Gigabyte is shown as GB and may also be searched as gigabytes, gb. Megabyte is shown as MB and may also be searched as megabytes, mb.
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