Unit converter
Megabytes to Gigabytes Converter
Convert megabytes to gigabytes for storage limits, broadband downloads, camera files, phone backups, and cloud plan allowances. 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.
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 |
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.