MB to GB conversion formula
1 megabyte = 0.001 gigabyte
The megabyte (MB) is 10⁶ bytes in decimal convention, or 1,048,576 bytes in binary units (MiB).
The gigabyte (GB) is 10⁹ bytes in decimal convention (the one storage marketing uses), or 2³⁰ bytes in binary units (GiB) — hence the “missing” space your USB drive always seems to have.
MB to GB conversion table
| MB | GB |
|---|---|
| 1 MB | 0.001 GB |
| 2 MB | 0.002 GB |
| 3 MB | 0.003 GB |
| 5 MB | 0.005 GB |
| 10 MB | 0.01 GB |
| 20 MB | 0.02 GB |
| 25 MB | 0.025 GB |
| 50 MB | 0.05 GB |
| 100 MB | 0.1 GB |
| 250 MB | 0.25 GB |
| 500 MB | 0.5 GB |
| 1000 MB | 1 GB |
How to convert MB to GB
- Write down the value in MB you want to convert.
- Multiply it by 0.001 — or use the converter above, which does it instantly.
- Read your result in GB. Done.
Frequently asked questions
How many GB is 1 MB?
Using the official conversion factor, 1 megabyte = 0.001 gigabyte. The converter above handles any value instantly.
What is the formula to convert megabyte to gigabyte?
1 megabyte = 0.001 gigabyte. Multiply any value in MB by this factor to get GB.
Is this MB to GB converter free?
Yes — 100% free, unlimited, with no sign-up. CalculUnits is funded by non-intrusive ads, never by paywalls.