1 GB in MB
1 × 1,024
1,024 MB
GB to MB Converter
Convert GB to MB instantly — a free gigabytes to megabytes converter with a full chart and the 1,000 vs 1,024 explanation. In binary units one GB equals 1,024 MB.
GB
MB
Edit either value — the other field updates instantly.
Result
1024 MB
1 GB = 1,024 MB (binary)
Values update as you type. Swap units to reverse the direction.
GB to MB formula
1 GB = 1,024 MB (binary)
Reverse: megabytes ÷ 1,024 = gigabytes
Storage sizes follow two conventions, and the difference is the reason GB to MB is confusing. Operating systems and this converter use binary multiples, where 1 GB equals 1,024 MB. Drive manufacturers and network specs usually use decimal SI multiples, where 1 GB equals exactly 1,000 MB. That gap is why a 500 GB drive shows up as roughly 465 GB in a file manager. Going the other way, 1,000 MB equals 0.9766 GB in binary terms — a number that catches people out when they are checking a data plan or a download estimate. Strict IEC terminology calls the binary quantities MiB and GiB, though consumer products almost never use those names. Every value in the chart below is in binary units and the third column converts megabytes back to gigabytes, so the reverse query is covered on the same page. The wider chain — KB to MB to GB to TB — divides by 1,024 at each step. See also the MB to GB converter.
Definition source: NIST prefixes for binary multiples.
Worked examples
2 GB in MB
2 × 1,024
2,048 MB
5 GB in MB
5 × 1,024
5,120 MB
100 GB in MB
100 × 1,024
102,400 MB
GB to MB chart
| Gigabytes (GB) | Megabytes (MB) | Megabytes back to gigabytes |
|---|---|---|
| 0.10 GB | 102 MB | 0.10 MB = 0.0001 GB |
| 0.25 GB | 256 MB | 0.25 MB = 0.0002 GB |
| 0.50 GB | 512 MB | 0.50 MB = 0.0005 GB |
| 1.00 GB | 1,024 MB | 1.00 MB = 0.0010 GB |
| 1.50 GB | 1,536 MB | 1.50 MB = 0.0015 GB |
| 2.00 GB | 2,048 MB | 2.00 MB = 0.0020 GB |
| 4.00 GB | 4,096 MB | 4.00 MB = 0.0039 GB |
| 8.00 GB | 8,192 MB | 8.00 MB = 0.0078 GB |
| 16.00 GB | 16,384 MB | 16.00 MB = 0.0156 GB |
| 32.00 GB | 32,768 MB | 32.00 MB = 0.0313 GB |
| 64.00 GB | 65,536 MB | 64.00 MB = 0.0625 GB |
| 128.00 GB | 131,072 MB | 128.00 MB = 0.1250 GB |
| 256.00 GB | 262,144 MB | 256.00 MB = 0.2500 GB |
| 512.00 GB | 524,288 MB | 512.00 MB = 0.5000 GB |
| 1,024.00 GB | 1,048,576 MB | 1,024.00 MB = 1.0000 GB |
Every row is calculated from the exact published definition. The third column reads the same value in the opposite direction, so the reverse conversion needs no second page.
Common gb to mb conversions
1 GB to MB
1 gigabyte equals 1,024 megabytes in binary units (1 × 1,024).
2 GB to MB
2 gigabytes equals 2,048 megabytes (2 × 1,024).
5 GB to MB
5 gigabytes equals 5,120 megabytes (5 × 1,024).
128 GB to MB
128 gigabytes equals 131,072 megabytes (128 × 1,024).
1000 MB to GB
1,000 megabytes equals 0.9766 GB in binary units. Under the decimal convention, 1,000 MB is exactly 1 GB.
1024 MB to GB
1,024 megabytes equals exactly 1 GB in binary units — this is the definition the operating system uses.
Frequently asked questions
How many MB are in a GB?
In binary units, 1 GB equals 1,024 MB. Manufacturers using decimal SI units treat 1 GB as exactly 1,000 MB, which is why a labelled capacity reads lower in a file manager.
How do I convert GB to MB?
Multiply gigabytes by 1,024. For example, 5 GB × 1,024 = 5,120 MB. To reverse it, divide megabytes by 1,024.
Is 1 GB 1,000 MB or 1,024 MB?
Both conventions are in use: 1,024 MB under the binary convention that operating systems report, and 1,000 MB under the decimal convention used by storage manufacturers and network specs.
What is 1,000 MB in GB?
In binary units 1,000 MB is 0.9766 GB. Under the decimal convention it is exactly 1 GB.
How do I convert KB to MB to GB to TB?
Divide by 1,024 at each step with binary units: 1,024 KB = 1 MB, 1,024 MB = 1 GB, 1,024 GB = 1 TB.
Does this converter use GB or GiB?
It uses the common operating-system convention of treating GB as 1,024 MB. Strict IEC terminology calls that binary quantity a GiB.
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Disclaimer
Conversion results use published unit definitions and are rounded for display. Verify critical engineering, medical, legal, or trade measurements with the relevant authority. Review our calculation methodology and full disclaimer.