Gigabytes to Megabytes
Convert gigabytes to megabytes instantly.
Gigabytes to Megabytes (GB to MB) Converter
1 gigabyte = 1,000 megabytes
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- 1 GB = 1000 MB
- 5 GB = 5000 MB
- 10 GB = 10000 MB
- 25 GB = 25000 MB
- MegabytesMB
- GigabytesGB
- MegabytesMB
- GigabytesGB
How it’s calculated
MB = GB × 1000
- Multiply the value in gigabytes by 1000.
- To go back, divide by 1000 (or multiply by 0.001).
- 1 GB = 1,000 MB · 1 MB = 0.001 GB
Quick examples
1 gigabyte = 1,000 megabytes · 1 MB = 0.001 GB
- 1 gigabyte = 1,000 megabytes
- 5 gigabytes = 5,000 megabytes
- 10 gigabytes = 10,000 megabytes
- 25 gigabytes = 25,000 megabytes
- 100 gigabytes = 100,000 megabytes
Gigabytes to megabytes conversion table
| Gigabytes (GB) | Megabytes (MB) |
|---|---|
| 0.1 GB | 100 MB |
| 0.5 GB | 500 MB |
| 1 GB | 1,000 MB |
| 2 GB | 2,000 MB |
| 3 GB | 3,000 MB |
| 4 GB | 4,000 MB |
| 5 GB | 5,000 MB |
| 6 GB | 6,000 MB |
| 7 GB | 7,000 MB |
| 8 GB | 8,000 MB |
| 9 GB | 9,000 MB |
| 10 GB | 10,000 MB |
| 15 GB | 15,000 MB |
| 20 GB | 20,000 MB |
| 25 GB | 25,000 MB |
| 30 GB | 30,000 MB |
| 40 GB | 40,000 MB |
| 50 GB | 50,000 MB |
| 75 GB | 75,000 MB |
| 100 GB | 100,000 MB |
| 250 GB | 250,000 MB |
| 500 GB | 500,000 MB |
| 1,000 GB | 1,000,000 MB |
About these units
Gigabyte (GB)
SI (metric)
1 GB = 8,000,000,000 bit (exact)
The decimal gigabyte: exactly 1,000,000,000 bytes. Drive makers use this, while Windows shows binary GiB labelled "GB".
Source: IEC 80000-13 (decimal and binary prefixes)
Megabyte (MB)
SI (metric)
1 MB = 8,000,000 bit (exact)
The decimal megabyte: exactly 1,000,000 bytes.
Source: IEC 80000-13 (decimal and binary prefixes)
Frequently asked questions
How do I convert gigabytes to megabytes?
Use MB = GB × 1000. Multiply the value in gigabytes by 1000.
How many megabytes are in 1 gigabyte?
1 gigabyte (GB) equals 1,000 megabytes (MB).
How many gigabytes are in 1 megabyte?
1 megabyte (MB) equals 0.001 gigabytes (GB).
What is 10 GB in MB?
10 gigabytes = 10,000 megabytes.
What is a gigabyte?
The decimal gigabyte: exactly 1,000,000,000 bytes. Drive makers use this, while Windows shows binary GiB labelled "GB".
What is a megabyte?
The decimal megabyte: exactly 1,000,000 bytes.
Related conversions
Formula: MB = GB × 1000. Factors last reviewed 2026-10-27.