Unit converter
Megabytes to Gigabytes Converter
Convert megabytes to gigabytes for storage limits, broadband downloads, camera files, phone backups, and cloud plan allowances.
1 megabyte = 0.001 gigabytes
Common megabytes to gigabytes values
| Megabytes | Gigabytes |
|---|---|
| 1 MB | 0.001 GB |
| 2 MB | 0.002 GB |
| 5 MB | 0.005 GB |
| 10 MB | 0.01 GB |
| 20 MB | 0.02 GB |
| 50 MB | 0.05 GB |
| 100 MB | 0.1 GB |
The exact factor used here is 0.001, so 1 MB is 0.001 GB. This calculator uses decimal data units: 1 megabyte is 1000000 bytes and 1 gigabyte is 1000000000 bytes. That matches the way many drive makers, network providers, and data plans label capacity. It is especially helpful when dozens of MB-sized files need to be compared with a GB quota.
How to convert
- Start with the data amount in megabytes.
- Multiply by 0.001 to convert the value into gigabytes.
- The factor comes from 1000000 bytes divided by 1000000000 bytes.
- To convert gigabytes back to megabytes, divide by 0.001 or multiply by 1000.
- For a mental estimate, move the decimal point three places left: 2500 MB is 2.5 GB, and 750 MB is 0.75 GB.
GB = MB * 0.001
A megabyte is represented as 1000000 bytes, and a gigabyte is represented as 1000000000 bytes. Dividing 1000000 by 1000000000 gives 0.001, so the megabyte value is multiplied by 0.001 to express it in gigabytes.
- MB
- the data amount in megabytes
- 0.001
- gigabytes in one megabyte
Worked example
A folder containing 4800 MB of video clips is 4800 multiplied by 0.001, which equals 4.8 GB. A 25 MB photo export would be 0.025 GB, so 200 similar exports would take about 5 GB using decimal units.
Key facts
- 1 MB is 0.001 GB.
- 1000 MB is 1 GB.
- 250 MB is 0.25 GB.
- 1024 MB is 1.024 GB in decimal units, not 1 GB.
Tips
- Move the decimal three places left when converting MB to GB by hand.
- Use decimal MB and GB for internet plans, drive labels, and most download estimates.
- Use MiB and GiB when a technical tool explicitly reports binary units.
Frequently asked questions
How many GB are in 1 MB?+
There are exactly 0.001 gigabytes in 1 megabyte using the decimal units in this calculator.
How many MB are in 1 GB?+
One gigabyte is 1000 megabytes in this decimal system, because 1000000000 bytes divided by 1000000 bytes equals 1000.
Is MB to GB the same as MiB to GiB?+
No. MB and GB here are decimal units based on powers of 1000. MiB and GiB are binary units based on powers of 1024.
Why does my computer show a different size?+
Operating systems and apps sometimes display binary units or mix labels, so a storage figure can look different from the decimal value printed on a drive or plan.
Things to watch
- Do not assume 1024 MB equals 1 GB unless the source is using binary-style labelling.
- Cloud storage, local drives, and operating systems may present capacity with different unit conventions.
Sources
Last updated: 2026-01-01
Conversions use internationally defined factors. Provided for general use; verify critical measurements independently.