Convert Gigabyte to Megabyte
1 gigabyte = 1,000 megabytes (GB to MB).
The gigabyte (GB) and the megabyte (MB) both measure data size. A gigabyte is larger than a megabyte — one gigabyte contains 1,000 megabytes. Going the other way, one megabyte is 0.001 gigabytes. The converter above does this in real time, and the reference chart lists the values that come up most often.
1 GB = 1,000 MB
How to convert Gigabytes to Megabytes
Multiply the gigabyte value by 1,000 to get megabytes.
Example: 10 gigabytes = 10,000 megabytes.
One decimal gigabyte equals exactly 1,000 megabytes. Multiplying a GB value by 1,000 gives MB in the SI sense used by storage manufacturers, cloud providers and mobile carriers. A 2.5 GB movie download is 2,500 MB; a 128 GB smartphone has space for 128,000 MB of content — at least before the operating system and pre-installed apps consume their share.
The binary alternative: one gibibyte (GiB) equals 1,024 mebibytes (MiB). When a Linux system reports a 7.45 GiB file, converting to MB (strictly speaking, MiB to MB) requires multiplying 7.45 × 1,024 = 7,628.8 MiB, then multiplying by 1.048576 to get decimal MB: 7,998.8 MB. The shortcut of treating GiB and GB as interchangeable introduces a 4.86% error — small on a single file, but significant across a large backup or data migration.
Cloud storage and object stores quote in decimal. Uploading 1 GB to AWS S3 means exactly 1,000 MB. If your tooling reports upload size in binary GiB, you need to convert to get an accurate billing estimate. The difference between 1 GiB and 1 GB (binary vs decimal) is 73.74 MB — roughly the size of a high-resolution photo.
Gigabyte to Megabyte Conversion Chart
| Gigabytes | Megabytes |
|---|---|
| 1 GB | 1,000 MB |
| 2 GB | 2,000 MB |
| 3 GB | 3,000 MB |
| 5 GB | 5,000 MB |
| 10 GB | 10,000 MB |
| 20 GB | 20,000 MB |
| 25 GB | 25,000 MB |
| 50 GB | 50,000 MB |
| 100 GB | 100,000 MB |
| 1000 GB | 1,000,000 MB |
Frequently Asked Questions
- How many megabytes are in a gigabyte?
- There are 1,000 megabytes in 1 gigabyte.
- How do you convert gigabytes to megabytes?
- Multiply the gigabyte value by 1,000 to get megabytes.
- What is 5 gigabytes in megabytes?
- 5 gigabytes equals 5,000 megabytes.
- What is 100 gigabytes in megabytes?
- 100 gigabytes equals 100,000 megabytes.
- What is 1 megabyte in gigabytes?
- 1 megabyte equals 0.001 gigabytes.
- Is this gigabyte to megabyte converter free?
- Yes. The converter is free, needs no sign-up, and runs entirely in your browser — the values you enter never leave your device.