Gigabytes to Megabytes
Convert Gigabytes to Megabytes instantly. Free online digital storage unit converter with exact formula, conversion table and FAQ.
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Formula
MB = GB × 1000
GB = MB ÷ 1000
Conversion table
| 1 GB | 1,000 MB |
| 5 GB | 5,000 MB |
| 10 GB | 10,000 MB |
| 20 GB | 20,000 MB |
| 50 GB | 50,000 MB |
| 100 GB | 100,000 MB |
| 500 GB | 500,000 MB |
| 1000 GB | 1,000,000 MB |
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Frequently asked questions
What is the source unit in this conversion?
The source unit is the gigabyte (GB), a decimal (SI) unit of digital storage equal to 1,000 megabytes or 10^9 bytes.
What is the destination unit in this conversion?
The destination unit is the megabyte (MB), a decimal unit of digital storage equal to 1,000 kilobytes or 10^6 bytes.
How do I convert gigabytes to megabytes?
Multiply the gigabyte value by 1,000 to get megabytes. For example, 4 GB × 1,000 = 4,000 MB.
Is the gigabyte to megabyte conversion exact?
It's exact under the decimal (SI) definition used here, where 1 GB = 1,000 MB. Note that some operating systems instead use the binary definition, where 1 GiB = 1,024 MiB; this page uses the decimal standard.
Where is this conversion commonly used?
It's used for describing file sizes, storage drive capacity, RAM, internet data plans, and download or upload sizes.
Can I convert megabytes back to gigabytes?
Yes. Divide the megabyte value by 1,000 to get gigabytes.
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About this conversion
This page converts gigabytes (GB), a decimal unit of digital storage, into megabytes (MB), a smaller decimal unit of digital storage.
This conversion is used constantly when checking file sizes, hard drive and SSD capacity, RAM specifications, and mobile data plan allowances.
The formula is MB = GB × 1000, based on the decimal (SI) definition where each storage prefix represents a factor of 1,000 from the next.
The conversion is exact under the decimal standard used here; note that some contexts, particularly operating systems reporting binary values, use 1,024 instead of 1,000 (GiB to MiB), which gives a slightly different result.
The decimal gigabyte and megabyte follow the International System of Units (SI) prefix conventions, as recommended by the International Electrotechnical Commission (IEC) alongside the binary GiB/MiB units for unambiguous labeling.