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Italiano1 GB = 1,000 MB
In the decimal system used by SI units, a gigabyte is 1,000 megabytes. To convert MB to GB, divide by 1,000: GB = MB ÷ 1,000. Example: a 2,500 MB video download is 2.5 GB.
The converter on this page is already set to this conversion and opens on 1,000 MB = 1 GB. Results appear as you type, to six significant digits, and the Formula line reads 1 MB = 0.001 GB. The ⇄ "Swap units" button goes from GB back to MB. If you need the 1,024-based figure, pick MiB and GiB in the From and To lists: 1 GiB = 1,024 MiB = 1,073,741,824 bytes. The "In every unit" table shows kB, TB, MiB and GiB at a glance.
MB to GB conversion chart
| MB | GB (÷ 1,000) | GiB (binary) | What it is |
|---|---|---|---|
| 100 | 0.1 | 0.09 | A big batch of photos |
| 500 | 0.5 | 0.47 | Half a gig of data |
| 700 | 0.7 | 0.65 | CD-ROM |
| 1,000 | 1 | 0.93 | 1 GB of mobile data |
| 1,500 | 1.5 | 1.40 | Standard-definition movie |
| 4,700 | 4.7 | 4.38 | Single-layer DVD |
| 5,000 | 5 | 4.66 | Small monthly data plan |
| 20,000 | 20 | 18.63 | Large phone game |
| 25,000 | 25 | 23.28 | Single-layer Blu-ray |
| 100,000 | 100 | 93.13 | Big data plan |
| 1,000,000 | 1,000 | 931.32 | 1 TB hard drive |
Decimal vs binary: where the missing space goes
Drive makers, macOS and mobile carriers count in decimal: 1 TB = 1,000 GB = 10¹² bytes. Windows divides by 1,024 at every step but still writes "GB". A 1 TB drive holds 1,000,000,000,000 bytes; divide that by 1,073,741,824 and you get 931.32. So Windows reports about 931 GB, 6.9% less, and not a single byte is actually missing.
Data plans, attachments and download speed
Data plans: a 5 GB plan is 5,000 MB. An app that burns 250 MB a day uses 1.75 GB over a week.
Email attachments: many email services cap a message at around 25 MB. Anything heavier usually goes as a cloud link.
MB vs Mb: a megabit (Mb) is one eighth of a megabyte (MB). A 300 Mbps connection tops out at 37.5 MB per second, so a 4 GB file needs about 107 seconds at best.
Frequently asked questions
Is 1 GB 1,000 MB or 1,024 MB?
1,000 MB under SI rules, which is what this converter uses. The 1,024 figure belongs to the gibibyte: 1 GiB = 1,024 MiB.
How many GB is 1,500 MB?
1.5 GB in decimal, or 1.40 GiB in binary.
How do I get the 1,024 calculation?
Choose MiB in the From list and GiB in the To list. 1,000 MiB then gives 0.976563 GiB.