Gigabytes to Megabytes Converter
Enter a value below to convert gigabytes to megabytes - one gigabyte is 1,000 megabytes in the decimal system (1 MB = 0.001 GB). For the reverse, use our megabytes to gigabytes converter.
1 GB = 1,000 MB (decimal). Convert gigabytes to megabytes. Need the reverse? See MB to GB.
Gigabyte
- Definition
- A gigabyte (symbol: GB) is a unit of digital information equal to 1,000 megabytes, or 1,000,000,000 (one billion) bytes, in the decimal system standardized by the International System of Units. It should not be confused with the binary gibibyte (GiB), which equals 1,073,741,824 bytes.
- History / origin
- The prefix "giga" comes from the Greek word for "giant" and denotes a factor of 10⁹ in the metric system. As storage grew past the megabyte, "gigabyte" became the everyday unit; in 1998 the IEC introduced "gibibyte" to remove the long-standing ambiguity between the decimal 10⁹ and binary 2³⁰ meanings.
- Current use
- The gigabyte is the headline unit for consumer storage and data plans - phone and SSD capacities, USB sticks, RAM, downloads, and monthly mobile data allowances are almost always quoted in GB.
Megabyte
- Definition
- A megabyte (symbol: MB) is a unit of digital information equal to 1,000 kilobytes, or 1,000,000 (one million) bytes, in the decimal system. One gigabyte contains 1,000 megabytes. The binary counterpart is the mebibyte (MiB), which equals 1,048,576 bytes.
- History / origin
- The prefix "mega" is Greek for "great" and stands for a factor of 10⁶ in the metric system. The megabyte was the dominant unit of the floppy-disk and early hard-drive era; historically it was sometimes used loosely for 1,048,576 bytes, a clash the IEC resolved in 1998 by naming that binary quantity the mebibyte.
- Current use
- The megabyte remains the natural unit for file-sized quantities - photos, songs, documents, app downloads and email attachments are commonly measured in MB, as are smaller data caps and transfer sizes.
Gigabyte to megabyte conversion table
| Gigabyte [GB] | Megabyte [MB] |
|---|---|
| 0.001 GB | 1 MB |
| 0.01 GB | 10 MB |
| 0.1 GB | 100 MB |
| 0.5 GB | 500 MB |
| 1 GB | 1,000 MB |
| 2 GB | 2,000 MB |
| 5 GB | 5,000 MB |
| 10 GB | 10,000 MB |
| 50 GB | 50,000 MB |
| 100 GB | 100,000 MB |
| 500 GB | 500,000 MB |
| 1,000 GB | 1,000,000 MB |
Popular gigabyte to megabyte conversions
Real-world storage and memory sizes converted to megabytes - the gigabyte capacities people look up most.
| Gigabyte [GB] | Megabyte [MB] |
|---|---|
| 1 GB | 1,000 MB |
| 2 GB | 2,000 MB |
| 4 GB | 4,000 MB |
| 8 GB | 8,000 MB |
| 16 GB | 16,000 MB |
| 32 GB | 32,000 MB |
| 64 GB | 64,000 MB |
| 128 GB | 128,000 MB |
| 256 GB | 256,000 MB |
| 512 GB | 512,000 MB |
| 1,000 GB | 1,000,000 MB |
How to convert gigabytes to megabytes
To convert gigabytes to megabytes, multiply the number of gigabytes by 1,000. For example, 16 GB × 1000 = 16,000 megabytes.
In the decimal system used for storage capacities and data plans, one gigabyte is defined as 1,000 megabytes, so converting GB to MB is a single multiplication. The binary units work differently: 1 gibibyte (GiB) = 1,024 mebibytes (MiB).
megabytes = gigabytes × 1000
1 GB = 1,000 MB · 1 MB = 0.001 GB
Example. To convert 64 GB to megabytes, multiply by 1,000: 64 GB = 64 × 1000 = 64,000 MB. Going the other way, 500 MB is 500 ÷ 1000 = 0.5 GB.
When you need to convert gigabytes to megabytes
Gigabyte-to-megabyte conversion comes up whenever a capacity quoted in GB has to be compared against file or transfer sizes measured in MB. Common cases:
- Checking how many MB of a mobile data plan a download or stream will use up.
- Splitting a multi-gigabyte backup or archive into megabyte-sized chunks or upload limits.
- Reading a drive or memory-card capacity in GB and comparing it to file sizes shown in MB.
- Setting megabyte quotas, attachment caps or per-file limits from a gigabyte allowance.
- Estimating how many photos or songs (each a few MB) fit in a given number of gigabytes.
Frequently asked questions
How many MB is 1 GB?
One gigabyte equals 1,000 megabytes in the decimal system used for storage and bandwidth. In binary units the equivalent is 1 GiB = 1,024 MiB.
How do I convert GB to MB?
Multiply the number of gigabytes by 1,000. For example, 16 GB = 16 × 1000 = 16,000 MB.
Is 1 GB 1000 or 1024 MB?
It depends on the units. In the decimal SI system used on packaging and for bandwidth, 1 GB = 1,000 MB. The 1,024 figure belongs to the binary units: 1 gibibyte (GiB) = 1,024 mebibytes (MiB). Operating systems often report binary GiB while drives are sold in decimal GB, which is why a 1 TB drive shows as about 931 GiB.
How many MB is 16 GB?
16 GB equals 16,000 MB in the decimal system (16 × 1000).
How many MB is 0.5 GB?
0.5 GB equals 500 MB. Half a gigabyte is 500 megabytes because 1 GB = 1,000 MB.
Is a GB bigger than a MB?
Yes. One gigabyte is 1,000 times larger than one megabyte, so a GB holds far more data than a MB.
Why does my drive show less than the advertised size?
Drives are sold in decimal units (1 GB = 1,000,000,000 bytes) but most operating systems display binary units (1 GiB = 1,073,741,824 bytes) while labelling them GB. The bytes are the same; only the divisor differs, so a 1 TB drive reads as about 931 GiB.
How many GB is 500 MB?
500 MB equals 0.5 GB. To convert megabytes to gigabytes, divide by 1,000.
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Convert gigabytes to other data storage units
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