justyourconvertMB to GB
Megabytes to gigabytes, with decimal and binary options.
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- Exact NIST Factors
MB to GB
Convert megabytes to gigabytes, decimal or binary
1 megabyte = 0.001 gigabytes
Formula: GB = MB ÷ 1,000
Megabytes to gigabytes table
| Megabytes (MB) | Gigabytes (GB) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 4 | 0.004 |
| 8 | 0.008 |
| 16 | 0.016 |
| 32 | 0.032 |
| 64 | 0.064 |
| 128 | 0.128 |
| 256 | 0.256 |
| 500 | 0.5 |
| 512 | 0.512 |
| 1,000 | 1 |
| 1,024 | 1.024 |
Calculated on your device with exact factors from NIST and the SI.
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How to convert MB to GB
Three steps, all in your browser.
- 1
Type a number
Enter a value in either box; the other updates instantly.
- 2
Pick the units
Switch units or swap them around.
- 3
Copy the result
Copy the answer or read it off the conversion table.
MB to GB: what to know
Megabytes and gigabytes measure file sizes, storage and data plans. Under the SI decimal prefixes, which storage makers, mobile carriers, macOS, iOS and Android use, 1 GB is 1000 MB, so GB = MB ÷ 1000. A 750 MB video is 0.75 GB and 4,500 MB of photos is 4.5 GB.
Computers address memory in powers of two, so a binary set of units also exists. The IEC 80000-13 standard names them kibibyte (KiB, 1024 bytes), mebibyte (MiB, 1024 KiB) and gibibyte (GiB, 1024 MiB). By that convention 1 GiB is 1024 MiB, and 4,500 MiB is 4.395 GiB.
Windows File Explorer and many older programs calculate in binary but label the results "MB" and "GB". That is why a drive sold as 1 TB (1,000,000,000,000 bytes) appears as about 931 GB in Windows: it is 931.3 GiB. Nothing is missing; the same bytes are being counted with a different unit. This page uses decimal units by default; choose MiB and GiB in the list to match what Windows shows. RAM is always sold in binary sizes, so 16 GB of memory is really 16 GiB.
Popular uses
- Checking whether files fit on a USB drive or in cloud storage
- Tracking mobile data use against a plan
- Estimating download and upload sizes
- Understanding why Windows shows less space than the box says
Tips for the best result
- Lowercase b means bits: 100 Mbit/s is 12.5 MB/s.
- Leave headroom: file systems use some space for their own structures.
- Use MiB and GiB when comparing with Windows or Linux tools that count in 1024s.
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