Megabytes to Gigabytes Converter
One Megabyte equals 0.001 Gigabytes (1 MB = 0.001 GB). Multiply a Megabyte value by 0.001 to get the equivalent in Gigabytes. Enter your value in the calculator above. The formula and examples below show how to calculate it by hand.
Formula
GB = MB × 0.001
Multiply the Megabyte value by 0.001 to get the equivalent value in Gigabytes.
Example Conversions
1 Megabyte (MB)
0.001 Gigabyte (GB)
5 Megabyte (MB)
0.005 Gigabyte (GB)
10 Megabyte (MB)
0.01 Gigabyte (GB)
25 Megabyte (MB)
0.025 Gigabyte (GB)
100 Megabyte (MB)
0.1 Gigabyte (GB)
Conversion Table
| Megabyte (MB) | Gigabyte (GB) |
|---|---|
| 0.1 | 0.0001 |
| 0.5 | 0.0005 |
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1000 | 1 |
How to Convert Manually
Use these steps to convert Megabyte values to Gigabyte without the calculator.
- Write down the value in Megabyte (MB) that you want to convert.
- Multiply that value by 0.001.
- For example, 10 Megabytes × 0.001 = 0.01 Gigabytes.
- Label the result as Gigabyte (GB).
Relative Size Comparison
This chart shows the visual difference in size between exactly one Megabyte and one Gigabyte.
About Megabyte and Gigabyte
The megabyte is an SI decimal data unit equal to exactly 1,000 kilobytes, or 1,000,000 bytes. Photos, songs, and app downloads are commonly measured in megabytes. The gigabyte is an SI decimal data unit equal to exactly 1,000 megabytes, or one billion bytes. Device storage and mobile data plans are commonly sold in gigabytes. One Megabyte equals 0.001 Gigabytes (1 MB = 0.001 GB). Megabyte is used in photo and music file sizes and in app download sizes. Gigabyte is used in phone and laptop storage.
Precision and Rounding:This converter keeps SI decimal prefixes (1 KB = 1,000 bytes) separate from IEC binary prefixes (1 KiB = 1,024 bytes). Match the symbol used by your source before converting because some operating-system interfaces display binary quantities with decimal labels.
See our guide to megabits vs. megabytes if you're unsure which one your download speed is quoted in.
Data units follow NIST guidance: decimal SI prefixes use powers of 1,000, while IEC binary prefixes use powers of 1,024 (reference).
Worked Example
15Megabytes equals0.015Gigabytes.
15 MB × 0.001 = 0.015 GB
FAQ
How do I convert Megabyte to Gigabyte?
Multiply the Megabyte value by 0.001 to get the equivalent value in Gigabytes.
What is the formula for Megabyte to Gigabyte?
The formula is GB = MB × 0.001.
How many Gigabytes are in 1 Megabyte?
1 Megabyte equals 0.001 Gigabytes.
Can I convert Gigabyte back to Megabyte?
Yes. 1 Gigabyte equals 1000 Megabytes, and the related converter can reverse the calculation.
What are common names for Megabyte and Gigabyte?
Megabyte is shown as MB and may also be searched as megabytes, mb, decimal megabyte. Gigabyte is shown as GB and may also be searched as gigabytes, gb, decimal gigabyte.
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