Convert GB to MB
Convert GB to MB instantly with the exact formula (1 GB = 1024 MB), a quick table and the reverse conversion.
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How to use GB to MB Converter
- 1
Open GB to MB Converter on this page. It loads right in your browser.
- 2
Add your file, text or values and adjust the settings.
- 3
Copy the result or download it. Nothing is uploaded or stored.
About this tool
This converter turns GB into MB as you type. One gigabyte equals 1024 MB, so the result is exact, not rounded guesswork. It is handy for file sizes, phone storage, downloads and upload limits.
How to convert GB to MB
Multiply the value in GB by 1024. To convert GB to MB, use the formula below.
MB = GB × 1024
Worked example
64 GB × 1024 = 65536 MB
Quick mental estimate
For a rough figure in your head, multiply by about 1000: 64 GB ≈ 64000 MB. Use the converter when you need the exact value.
GB to MB table
| GB (GB) | MB (MB) |
|---|---|
| 1 | 1024 |
| 2 | 2048 |
| 5 | 5120 |
| 10 | 10240 |
| 64 | 65536 |
| 100 | 102400 |
| 128 | 131072 |
| 256 | 262144 |
| 512 | 524288 |
| 1000 | 1024000 |
Quick reference
- 2 GB = 2048 MB
- 10 GB = 10240 MB
- 100 GB = 102400 MB
- 256 GB = 262144 MB
- 1000 GB = 1024000 MB
Where GB and MB are used
Operating systems count storage in binary multiples, so 1 GB here means 1024 MB and 1 MB means 1024 KB. Storage manufacturers often use decimal units (1 GB = 1000 MB), which is why a new drive shows slightly less space than advertised.
Tips
- Use the swap button to convert MB back to GB.
- Choose 0 to 6 decimals; the full-precision value is used internally.
- The side panel also shows the value in every other unit of the same type.
Why use this converter
It is free, needs no sign-up and runs entirely in your browser, so it keeps working even offline once the page is loaded. Need the opposite? Use the MB to GB converter or the full unit converter.
Features
- Instant GB to MB conversion as you type
- Exact factor: 1 GB = 1024 MB
- Quick conversion table of common values
- Swap button for MB to GB
- Choose 0 to 6 decimal places
- Works offline in your browser
Frequently asked questions
How many MB are in one gigabyte?
One gigabyte equals 1024 MB.
How do I convert GB to MB?
Multiply the number of GB by 1024. For example, 64 GB = 65536 MB.
What is 256 GB in MB?
256 GB equals 262144 MB.
Is the conversion exact?
Yes. The tool uses the internationally defined conversion factor and only rounds the displayed result to the decimals you choose.