Ans

Unit converter

Gigabytes to megabytes.

Convert GB to MB and MB to GB. Type in either box and the other follows. Decimal gigabytes, as advertised: 1000 MB each. The binary gibibyte is 1024 MiB and about 7% larger.

GB → MBExact definition
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Gigabytes to megabytes — common values, to 6 significant figures.
GBMB
0.5 GB500 MB
1 GB1000 MB
2 GB2000 MB
4 GB4000 MB
8 GB8000 MB
16 GB16000 MB
32 GB32000 MB
64 GB64000 MB
128 GB128000 MB
256 GB256000 MB
1 GB=1000 MB 1 MB=0.001 GB

Definitions

  • The gigabyte is a thousand million bytes. Storage is sold in gigabytes; Windows reports the same space in gibibytes, which is why a drive looks smaller than the box.
  • The megabyte is a million bytes when a drive maker or a network operator uses it. Some software still shows 1 048 576 bytes and calls it MB.
  • This conversion is exact by definition. 1 GB = 1000 MB.
  • Decimal prefixes (kB, MB, GB) are powers of 1000; binary prefixes (KiB, MiB, GiB) are powers of 1024. Drive makers use decimal; operating systems often report binary, which is why a 1 TB drive shows as 931 GiB.

How it works

One direction multiplies and the other divides by the same number, so nothing is lost by going back and forth.

The value passes through B, the unit every other digital storage unit on the site is defined against, rather than a number written into this page on its own. That is why the figure here, the figure in the table above and the general digital storage converter always agree.

Display precision limits significant figures rather than decimal places, because one fixed number of decimals is useless across a range this wide. Very large and very small results switch to scientific notation with a proper superscript exponent. The editable box always holds a plain number at full working precision, so you can carry on from either side.

Common questions this answers: how many megabytes in a gigabyte (1000 mb) (1000), how many gigabytes in a megabyte (1000 kb) (0.001), and what 8 GB is in megabytes (8000 MB).

From the maker of Ans — a scientific calculator you can own. Same idea: a proper instrument, nothing in the way.