Comparing to an MB figure
A 2 GB allowance is 2048 MB next to a download quoted in MB.
Use GB to MB
Converts gigabytes to megabytes in this tab, with nothing sent anywhere.
Runs entirely on your deviceThe conversion happens in this browser tab. Nothing you type is uploaded, logged or stored, which is worth knowing for anything you would not paste into a search box.
Two binary gigabytes equal 2,048 megabytes in this calculator. Drive makers and network plans often use decimal units instead, where 2 GB means 2,000 MB, so match the convention used by the source figure.
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Browse all general convertersAbout GB to MB
A size in gigabytes sometimes needs to be in megabytes - comparing an allowance to a download stated in MB, or a limit that quotes megabytes. Converting gigabytes to megabytes expands the figure at 1024 MB per GB. So a 4 GB allowance is 4096 MB and a 0.5 GB file is 512 MB, the numbers that line up with sizes quoted in megabytes. Comparing a gigabyte plan against a download or update quoted in megabytes is the usual case, where both numbers have to be in the same unit before the sum makes sense. A streaming quality setting rated in gigabytes per hour becomes megabytes per minute once converted, which is the figure that reveals how fast a cap disappears. Storage labels may distinguish GB from GiB; check the unit convention before comparing a capacity with an upload limit.
Using GB to MB
- Type a number of GB. You can paste a value with its unit; the tool reads the number.
- The exact factor is applied and the result is shown as MB, updating live as you type.
- Copy the answer, or switch to the reverse converter to go from MB back to GB.
Where gb to mb helps
Both directions
Need the opposite? The MB-to-GB converter is linked below and uses the exact inverse factor.
An allowance is not a transfer speed
This converter uses the 1024-based convention, so 0.5 GB gives 512 MB. A service using decimal units would call that 500 MB instead. Verify which convention governs a download limit before deciding whether several files will fit. GB and MB describe data quantity; Gb/s and Mb/s describe bit rates and need a separate time calculation.
Before you use the result
- The result is rounded for readability, so a value converted and then converted back may differ in the last decimal place. The underlying factor is exact.
- Units in your input are ignored - only the number is read - so make sure the figure you type is really in GB.
Questions about GB to MB
How many MB in a GB?
1024 megabytes make one gigabyte in the binary convention used here. The decimal convention counts 1000, so storage labels can read a little higher than a device shows.
Is my data uploaded?
No. GB to MB does the arithmetic in this browser tab; the value is calculated on your device and is not sent to a server.
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