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Convert gigabytes to megabytes
Instant, accurate GB → MB conversion with a live converter, table and formula.
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1 gigabyte = 1000 megabytes
1 megabyte = 0.001 gigabytes
gigabytes to megabytes table
| gigabytes (GB) | megabytes (MB) |
|---|---|
| 0.5 | 500 |
| 1 | 1000 |
| 2 | 2000 |
| 5 | 5000 |
| 10 | 10000 |
| 20 | 20000 |
| 50 | 50000 |
| 100 | 100000 |
| 500 | 500000 |
| 1000 | 1000000 |
Formula
megabytes = gigabytes × 1000.
Example
10 gigabytes = 10000 megabytes.
What is a gigabyte?
A gigabyte (GB) is 1,000 megabytes — a few hours of video.
What is a megabyte?
A megabyte (MB) is 1,000 kilobytes — about a minute of MP3 audio.
Real-world reference points
A photo is a few MB; an MP3 song ~4 MB; an HD movie ~4 GB; a modern phone stores 128+ GB.
| Reference | gigabytes | megabytes |
|---|---|---|
| E-mail (text only) | 0.00002 GB | 0.02 MB |
| Smartphone photo | 0.003 GB | 3 MB |
| MP3 song | 0.004 GB | 4 MB |
| DVD capacity | 4.7 GB | 4,700 MB |
| HD movie stream | 4 GB | 4,000 MB |
Mistakes to avoid with data conversions
- Megabits vs megabytes: your '100 Mbps' connection downloads at ~12.5 MB/s — ISPs quote bits, files are bytes.
- Decimal vs binary units: drives are sold in decimal GB (10⁹), so a '1 TB' drive shows ~931 'GB' (GiB) in Windows.
- Assuming video size scales with length only — resolution and bitrate matter more than minutes.
Frequently asked questions
How many megabytes in a gigabytes?+
1 gigabyte = 1000 megabytes.
How do I convert gigabytes to megabytes?+
Enter the value in the gigabytes box above and the megabytes value appears instantly. You can also type in the megabytes box to convert the other way.
Is this GB to MB converter free?+
Yes — it is 100% free, needs no sign-up, and runs entirely in your browser.