Convert gibibytes to megabytes

One gibibyte is 1073.74182 megabytes. To convert any amount, multiply by 1073.74182. Going the other way, one megabyte is 0.000931322575 gibibytes.

Multiply the gibibyte figure by 1073.74182. So MB = GiB × 1073.74182. For a quick mental estimate, multiplying by about 1074 gets you within a percent or so, which is close enough for most everyday purposes.

One gibibyte is what your OS calls a 'GB' of memory. A gibibyte is exactly 1,024³ bytes, about 7.4% more than a gigabyte. RAM is always sold in binary units even when storage is not.

One megabyte is a high-quality photo. A megabyte is one million bytes. Mobile data allowances, file sizes and download figures almost always use this decimal definition.

Because two different definitions are in play. Storage manufacturers use decimal units — 1 TB means exactly one trillion bytes. Windows and many other systems display binary units but label them with decimal names, so they show that same drive as 931 "GB" when they mean 931 gibibytes. Nothing is missing and nothing is faulty; the drive holds exactly what it says, measured differently. The IEC standardised kibi, mebi and gibi in 1998 specifically to end this, but adoption has been patchy.

Yes — both decimal and binary prefixes are exactly defined powers, so every figure here is exact rather than approximate. The results are shown to seven significant figures; the underlying arithmetic uses full double precision.