About the mib to gb calculation
One mebibyte is exactly 0.00104858 gigabytes, so converting between them is a single multiplication. Enter any value above and the result updates as you type. Binary megabyte — 1,024² bytes. What operating systems usually mean when they display "MB". Decimal gigabyte. This is why a "1 TB" drive shows as roughly 931 GB in your operating system.
Formula
GB = MiB × 0.00104858
1 MiB = 0.00104858 GB
1 GB = 953.674 MiBWorked example
To convert 500 MiB, multiply by 0.00104858: 500 × 0.00104858 = 0.524288 GB.
Frequently asked questions
How many gigabytes are in a mebibyte?
There are 0.00104858 gigabytes in one mebibyte. To convert any amount, multiply the number of mebibytes by 0.00104858.
How do I convert gigabytes back to mebibytes?
Divide instead of multiplying, or equivalently multiply by 953.674. One gigabyte is 953.674 mebibytes.
Is this conversion exact?
Yes, provided both sides use the same convention. Decimal units (KB, MB, GB) are powers of 1,000 and binary units (KiB, MiB, GiB) are powers of 1,024. Both are exact — the confusion comes from software labelling binary values with decimal names.
Where is each of these units used?
Mebibytes: binary megabyte — 1,024² bytes. What operating systems usually mean when they display "MB". Gigabytes: decimal gigabyte. This is why a "1 TB" drive shows as roughly 931 GB in your operating system.
Sources
- IEC 80000-13 — binary and decimal prefixes for information units