Convert Megabytes to Gigabytes (MB to GB)
1 megabyte (MB) = 0.001 gigabytes (GB). 1 GB = 1000 MB. Example: 500 MB = 500 × 0.001 = 0.5 GB.
Also searched as MB to GB, megabytes to gigabytes, mb in gb, convert MB into GB, how many GB is 500 MB and MB to GB converter.
1 MB = 0.001 GB
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk megabyte to gigabyte converter to paste a column from Excel.
How to Convert Megabyte to Gigabyte
- 1 MB = 0.001 GB
- 1 GB = 1000 MB
- Example: convert 500 MB to GB: 500 MB = 500 × 0.001 GB = 0.5 GB
Formula
GB = MB ÷ 1000
Derivation from SI units:
- 1 MB = 10⁶ bytes = 8 × 10⁶ bits (decimal, SI).
- 1 GB = 10⁹ bytes = 8 × 10⁹ bits (decimal, SI).
- 1 MB = 8000000 bit ÷ 8000000000 bit per GB = 0.001 GB
Both units are defined exactly, so the factor is exact. Megabyte definition: megabyte; Gigabyte definition: gigabyte.
Worked examples
- A 500 MB video file is 0.5 GB.
500 MB × 0.001 = 0.5 GB - A 2048 MB folder of photos is 2.048 GB.
2048 MB × 0.001 = 2.048 GB
Megabyte to Gigabyte conversion table
| Megabytes (MB) | Gigabytes (GB) |
|---|---|
| 1 MB | 0.001 GB |
| 2 MB | 0.002 GB |
| 4 MB | 0.004 GB |
| 8 MB | 0.008 GB |
| 16 MB | 0.016 GB |
| 32 MB | 0.032 GB |
| 64 MB | 0.064 GB |
| 100 MB | 0.1 GB |
| 128 MB | 0.128 GB |
| 256 MB | 0.256 GB |
| 500 MB | 0.5 GB |
| 1000 MB | 1 GB |
Where it's used
File sizes in megabytes from cameras, email attachments and downloads are converted to gigabytes to compare with phone storage, data plans and cloud quotas. Divide by 1000.
Megabyte to other data storage units
| Conversion | 1 MB equals |
|---|---|
| megabyte to gigabyte | 0.001 GB |
| megabyte to byte | 1000000 B |
| megabyte to kilobyte | 1000 kB |
| megabyte to terabyte | 0.000001 TB |
| megabyte to bit | 8000000 bit |
| megabyte to megabit | 8 Mbit |
| megabyte to kibibyte | 976.5625 KiB |
| megabyte to mebibyte | 0.9536743164 MiB |
Show 5 more units
| megabyte to gibibyte | 0.0009313225746 GiB |
|---|---|
| megabyte to kilobit | 8000 kbit |
| megabyte to gigabit | 0.008 Gbit |
| megabyte to petabyte | 1 × 10⁻⁹ PB |
| megabyte to tebibyte | 9.094947018 × 10⁻⁷ TiB |
Frequently asked questions
How many MB are in a GB?
Exactly 1000 in decimal units: 1 GB = 1000 MB, so 1 MB = 0.001 GB. In binary units 1 GiB = 1024 MiB.
Why do some sites say 1 GB = 1024 MB?
They mean binary units (GiB and MiB), which Windows and older textbooks label GB and MB. Data plans, drive makers and macOS use 1000.
How many gigabytes are in 1 megabyte?
1 MB = 0.001 GB.
How do I convert megabytes to gigabytes?
Multiply the value in MB by 0.001, or divide it by 1000. For example, 500 MB × 0.001 = 0.5 GB.
Is the MB to GB conversion exact?
Yes. Both units are defined exactly, and 1 MB is exactly 0.001 GB.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7 (SI prefixes); hertz, Table 4.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Megabytes to Gigabytes (MB to GB). Retrieved October 25, 2026, from https://scientificconverters.com/data-storage/megabytes-to-gigabytes/
IEEE
Scientific Converters, "Convert Megabytes to Gigabytes (MB to GB)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/data-storage/megabytes-to-gigabytes/