MB to GB converter
There are 1,000 MB in 1 GB. To convert MB to GB, divide the megabytes by 1,000; in binary units, 1,024 MiB make 1 GiB.
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500 megabytes =
0.5GB
Formula: GB = MB ÷ 1,000
Show the steps
- Definition: 1 MB = 10⁶ B = 1 000 000 B; 1 GB = 10⁹ B
- 500 MB ÷ 1,000 = 0.5 GB
Definitions used: 1 MB = 10⁶ B = 1 000 000 B; 1 GB = 10⁹ B.
Source: NIST, Prefixes for binary multiples, checked on .
How to convert megabytes to gigabytes
Divide the value in megabytes by 1,000. The factor follows from the definitions: 1 MB = 10⁶ B = 1 000 000 B, and 1 GB = 10⁹ B.
GB = MB ÷ 1,000
Worked example: 500 MB to GB
- Definition: 1 MB = 10⁶ B = 1 000 000 B; 1 GB = 10⁹ B
- 500 MB ÷ 1,000 = 0.5 GB
- Answer: 500 MB = 0.5 GB.
Megabytes to gigabytes chart
| Megabytes (MB) | Gigabytes (GB) |
|---|---|
| 1 | 0.001 |
| 10 | 0.01 |
| 50 | 0.05 |
| 100 | 0.1 |
| 128 | 0.128 |
| 250 | 0.25 |
| 256 | 0.256 |
| 500 | 0.5 |
| 512 | 0.512 |
| 750 | 0.75 |
| Megabytes (MB) | Gigabytes (GB) |
|---|---|
| 1,000 | 1 |
| 1,024 | 1.024 |
| 1,500 | 1.5 |
| 2,000 | 2 |
| 2,048 | 2.048 |
| 4,096 | 4.096 |
| 5,000 | 5 |
| 8,192 | 8.192 |
| 10,000 | 10 |
| 16,000 | 16 |
Values rounded to 6 significant digits. Type any other number in the converter at the top of the page.
Is 1 GB 1,000 MB or 1,024 MB?
With SI prefixes, 1 GB is 1,000 MB (10⁹ bytes); this is what storage makers print on drives. Memory has traditionally been counted in powers of two, where 1,024 units make the next one. To end the ambiguity the IEC created binary prefixes: 1 GiB (gibibyte) = 1,024 MiB = 2³⁰ bytes. NIST describes both on its binary prefixes page.
Why does a 500 GB drive show less space on my computer?
The label counts decimal gigabytes, 500 × 10⁹ bytes. A system that counts in binary units reports the same bytes as 465.66 GiB, about 7% less, and may still print “GB” next to the number. Nothing is missing; the unit changed.
More questions about megabytes and gigabytes
How many GB is 1,024 MB?
In decimal units, 1,024 MB is 1.024 GB. In binary units, 1,024 MiB is exactly 1 GiB.
How many MB are in 2 GB?
2 GB is 2,000 MB. 2 GiB is 2,048 MiB.
What is the difference between MB and Mb?
MB is megabytes, used for file sizes. Mb is megabits, used for connection speeds. By the usual convention a byte is 8 bits, so 100 Mb/s moves about 12.5 MB each second.
How many bytes is 1 MB?
One megabyte is 1,000,000 bytes. One mebibyte (MiB) is 1,048,576 bytes.
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Sources and limits
- NIST, Prefixes for binary multiples
IEC 60027-2 (second edition, 2000-11), as described by NIST in “Prefixes for binary multiples”.
National Institute of Standards and Technology. Edition or effective date: . Text in force when checked on .
This is a calculation aid, not an official measurement service. Results are rounded to 6 significant digits for display. For trade, engineering, medical dosing or legal documents, confirm the figure in the official source. Nothing you type leaves your browser.