Gigabyte to Megabyte Converter
Convert Gigabyte (GB) to Megabyte (MB). Results update as you type, with a conversion table and the formula below.
1 GB =
1,024 MB
GB to MB conversion table
| GB | MB |
|---|---|
| 1 | 1,024 |
| 2 | 2,048 |
| 3 | 3,072 |
| 4 | 4,096 |
| 5 | 5,120 |
| 6 | 6,144 |
| 7 | 7,168 |
| 8 | 8,192 |
| 9 | 9,216 |
| 10 | 10,240 |
| 15 | 15,360 |
| GB | MB |
|---|---|
| 20 | 20,480 |
| 25 | 25,600 |
| 30 | 30,720 |
| 40 | 40,960 |
| 50 | 51,200 |
| 60 | 61,440 |
| 70 | 71,680 |
| 80 | 81,920 |
| 90 | 92,160 |
| 100 | 102,400 |
How to use
- Type the GB value to convert.
- The result appears instantly in MB; the swap button reverses direction.
- For common values, check the conversion table below.
Frequently asked questions
How many MB is 1 GB?+
1 GB = 1,024 MB. The table below lists the values you'll reach for most often.
Is a gigabyte exactly 1,000 megabytes?+
This converter treats 1GB as 1,024MB, matching how operating systems report file sizes. Mobile carriers often quote allowances using 1,000MB instead, which is where the discrepancy comes from.
How accurate are the results?+
The math uses internationally standardized definitions; only the display is rounded to significant digits. Accurate enough for school, work and daily life.
How do I convert MB back to GB?+
Hit the swap arrows in the middle of the converter above — the direction flips and your value is kept.
Is it really free?+
Yes. No sign-up, no install, no usage limits. The site is ad-supported.
Unit guide
The formula
1 GB equals 1,024 MB — multiply a GB value by 1,024 to get MB. Example: 5 GB × 1,024 = 5,120 MB.
Going the other way, 1 MB = 0.000977 GB — multiply by 0.000977, or hit the swap button on the converter above.
When is this conversion needed?
Useful for comparing storage sizes, data-plan math and estimating file transfer times.
Where megabytes meet gigabytes
Mail attachment limits, mobile data allowances and game install sizes all live in this range. It is the conversion for working out what fraction of a multi-gigabyte video is blocked by a 25MB attachment cap, or how many episodes are left in a data plan.