How many MiB are in a GB?

953.674316406 MiB in a decimal gigabyte, and exactly 1,024 MiB in a binary one, the gibibyte (GiB). Press swap on this page and type 1 in the box to see the first of those: 1 GB is 953.674316406 MiB, 4.7 GB is 4,482.26928711 MiB and 100 GB is 95,367.4316406 MiB. The awkward digits are the whole point of the pair, since 1,000,000,000 is not a power of two.

Is 1,024 MiB the same as 1 GB?

No. 1,024 MiB is 1,073,741,824 bytes, which this page reports as 1.073741824 GB and, one row further down, as exactly 1 GiB. The habit of calling 1,024 of something the next unit up is right inside the binary family, where 1,024 MiB is 1 GiB, and wrong when you cross into the decimal one, where the next unit up starts at 1,000,000,000 bytes. Both readings are on screen together so the step is visible rather than assumed.

What is the formula for MiB to GB?

GB = MiB × 0.001048576 exactly, since 1,048,576 / 1,000,000,000 = 0.001048576. In reverse, MiB = GB × 1,000,000,000 / 1,048,576, an exact multiplier of 953.67431640625. Multiplying by the rounded 953.674316406 only approximates it. For a binary target, GiB = MiB / 1,024, so 1 MiB is exactly 0.0009765625 GiB. Decimal-rational arithmetic preserves the written quantity and factors before rounding displays beyond twelve significant digits.

Worked example: what is 8,192 MiB in GB?

An explicitly supplied 8,192 MiB is exactly 8.589934592 GB and 8 GiB, representing 8,589,934,592 bytes. Likewise 2,048 MiB is exactly 2.147483648 GB, 4,096 MiB exactly 4.294967296 GB and 16,384 MiB exactly 17.179869184 GB. These are arithmetic conversions of named quantities; they do not determine the byte count or convention of a physical memory module or an ambiguous GB label.

Which of the two does my computer show?

Check the specific application’s documented unit convention, options or byte count. A computer, operating-system name, file-listing flag or ambiguous M/G/GB label does not establish a convention here. For an explicit 1,073,741,824 bytes, the converter gives exactly 1.073741824 decimal GB and 1 binary GiB. It displays named units for the supplied quantity; it cannot infer which quantity another application meant.

What is 3,800 MiB in GB, for a DVD image?

A supplied 3,800 MiB is exactly 3.9845888 GB. A separate 4,700 MiB is exactly 4.9283072 GB, exceeding a supplied 4.7 decimal GB byte quantity. In reverse, 4.7 GB displays as 4,482.26928711 MiB. Compare explicitly documented byte quantities rather than assuming an image or disc convention. This conversion does not establish a disc’s writable capacity, file-system overhead, image format or whether a burn will succeed.

Why does 1 MiB in TiB print as 9.53674316406e-7?

Displayed magnitudes below 0.000001 use exponential notation. For 1 MiB, the TiB row displays 9.53674316406e-7, while the TB row is exactly 0.000001048576. The exact binary fraction 1/1,048,576 terminates but has more digits than the twelve-significant-digit display. Magnitudes at or above 1e15 also use exponential notation.

Can I convert GB back to MiB here?

Yes. The swap button between the two boxes reverses the pair into gigabytes to mebibytes without a reload, where 1 GB is 953.674316406 MiB and 256 MiB going the other way is 0.268435456 GB. Both menus stay open after the swap, so the same figure can go to GiB, MB or plain bytes: 1 MiB is 1,048,576 bytes and 1.048576 MB.

Why does the page open on mebibytes and gigabytes when I last converted something else?

This focused page opens on Mebibyte and Gigabyte, while preserving the main converter’s saved unit pair. When storage is usable, a saved value and uncommon-unit preference can travel between pages. Its suffix must still match From. Valid deliberate scalar edits can save those fields after a short delay; invalid or incomplete drafts preserve the saved record. Unusable or conflicting records remain until you use Forget saved settings, which keeps the current conversion on screen. Copy result copies the displayed headline without digit-grouping commas; each visible conversion row has its own Copy button. Displayed and copied values round to twelve significant digits. If native copying fails, a complete selectable summary identifies the input, selected pair and conventions and includes every unit in the category, including uncommon units.

Does anything I type leave the browser?

Your input and converted values are calculated in the browser and are not uploaded by the converter. The definitions arrive with the page, so conversion needs no external data lookup and keeps working offline after the page has loaded. The core conversion needs no account.

MiB to GB Converter

This pair crosses binary and decimal storage definitions; the exact conversion factor terminates, although long displayed results still round. A mebibyte (MiB) is binary, 2 to the 20th power, so 1,048,576 bytes, under its explicit unit definition. A gigabyte (GB) as written here is decimal, 1,000,000,000 bytes, under its explicit decimal definition. So GB = MiB x 1,048,576 / 1,000,000,000, which is one multiplication by 0.001048576: 1 MiB is 0.001048576 GB, a supplied 700 MiB quantity is 0.7340032 GB, and 1,000 MiB is 1.048576 GB. The number that surprises people is 1,024 MiB, which is 1.073741824 GB and not 1 GB, because 1,024 MiB is a gibibyte and a gibibyte is 7.37 percent more bytes than a gigabyte. This page opens the converter with Mebibyte in the From box and Gigabyte in the To box, ahead of whatever pair you last used, and the list under the headline carries the same size into bits, bytes, kB, MB, TB, KiB, GiB and TiB at once, so 1,024 MiB shows as 1.073741824 GB and exactly 1 GiB side by side.

From

To0.001048576

Category: Digital storage

Base unit: byte

kB, MB, GB and TB use powers of 1,000; KiB, MiB, GiB and TiB use powers of 1,024. One byte is eight bits; labels used by other software may differ.

Results round to 12 significant digits using the listed unit definitions. Input must have a finite numeric magnitude and at most 512 significant digits. Type a single decimal or scientific number; a matching From unit suffix is accepted. Commas and grouped spaces separate thousands; decimal commas, fractions and compound measurements are refused.

1 MiB in every digital storage unit

Bitbit
8,388,608
ByteB
1,048,576
KilobytekB
1,048.576
MegabyteMB
1.048576
GigabyteGB
0.001048576
TerabyteTB
0.000001048576
KibibyteKiB
1,024
GibibyteGiB
0.0009765625
TebibyteTiB
9.53674316406e-7

Selectable complete conversion

Unit Converter — Digital storage
Input: 1 (Mebibyte, MiB)
Result: 0.001048576 GB (Gigabyte)
Displayed values round to 12 significant digits.
kB, MB, GB and TB use powers of 1,000; KiB, MiB, GiB and TiB use powers of 1,024. One byte is eight bits; labels used by other software may differ.
All other units:
Bit (bit): 8388608
Byte (B): 1048576
Kilobyte (kB): 1048.576
Megabyte (MB): 1.048576
Gigabyte (GB): 0.001048576
Terabyte (TB): 0.000001048576
Kibibyte (KiB): 1024
Gibibyte (GiB): 0.0009765625
Tebibyte (TiB): 9.53674316406e-7

Common questions

How many MiB are in a GB?: 953.674316406 MiB in a decimal gigabyte, and exactly 1,024 MiB in a binary one, the gibibyte (GiB). Press swap on this page and type 1 in the box to see the first of those: 1 GB is 953.674316406 MiB, 4.7 GB is 4,482.26928711 MiB and 100 GB is 95,367.4316406 MiB. The awkward digits are the whole point of the pair, since 1,000,000,000 is not a power of two.
Is 1,024 MiB the same as 1 GB?: No. 1,024 MiB is 1,073,741,824 bytes, which this page reports as 1.073741824 GB and, one row further down, as exactly 1 GiB. The habit of calling 1,024 of something the next unit up is right inside the binary family, where 1,024 MiB is 1 GiB, and wrong when you cross into the decimal one, where the next unit up starts at 1,000,000,000 bytes. Both readings are on screen together so the step is visible rather than assumed.
What is the formula for MiB to GB?: GB = MiB × 0.001048576 exactly, since 1,048,576 / 1,000,000,000 = 0.001048576. In reverse, MiB = GB × 1,000,000,000 / 1,048,576, an exact multiplier of 953.67431640625. Multiplying by the rounded 953.674316406 only approximates it. For a binary target, GiB = MiB / 1,024, so 1 MiB is exactly 0.0009765625 GiB. Decimal-rational arithmetic preserves the written quantity and factors before rounding displays beyond twelve significant digits.
Worked example: what is 8,192 MiB in GB?: An explicitly supplied 8,192 MiB is exactly 8.589934592 GB and 8 GiB, representing 8,589,934,592 bytes. Likewise 2,048 MiB is exactly 2.147483648 GB, 4,096 MiB exactly 4.294967296 GB and 16,384 MiB exactly 17.179869184 GB. These are arithmetic conversions of named quantities; they do not determine the byte count or convention of a physical memory module or an ambiguous GB label.
Which of the two does my computer show?: Check the specific application’s documented unit convention, options or byte count. A computer, operating-system name, file-listing flag or ambiguous M/G/GB label does not establish a convention here. For an explicit 1,073,741,824 bytes, the converter gives exactly 1.073741824 decimal GB and 1 binary GiB. It displays named units for the supplied quantity; it cannot infer which quantity another application meant.
What is 3,800 MiB in GB, for a DVD image?: A supplied 3,800 MiB is exactly 3.9845888 GB. A separate 4,700 MiB is exactly 4.9283072 GB, exceeding a supplied 4.7 decimal GB byte quantity. In reverse, 4.7 GB displays as 4,482.26928711 MiB. Compare explicitly documented byte quantities rather than assuming an image or disc convention. This conversion does not establish a disc’s writable capacity, file-system overhead, image format or whether a burn will succeed.
Why does 1 MiB in TiB print as 9.53674316406e-7?: Displayed magnitudes below 0.000001 use exponential notation. For 1 MiB, the TiB row displays 9.53674316406e-7, while the TB row is exactly 0.000001048576. The exact binary fraction 1/1,048,576 terminates but has more digits than the twelve-significant-digit display. Magnitudes at or above 1e15 also use exponential notation.
Can I convert GB back to MiB here?: Yes. The swap button between the two boxes reverses the pair into gigabytes to mebibytes without a reload, where 1 GB is 953.674316406 MiB and 256 MiB going the other way is 0.268435456 GB. Both menus stay open after the swap, so the same figure can go to GiB, MB or plain bytes: 1 MiB is 1,048,576 bytes and 1.048576 MB.
Why does the page open on mebibytes and gigabytes when I last converted something else?: This focused page opens on Mebibyte and Gigabyte, while preserving the main converter’s saved unit pair. When storage is usable, a saved value and uncommon-unit preference can travel between pages. Its suffix must still match From. Valid deliberate scalar edits can save those fields after a short delay; invalid or incomplete drafts preserve the saved record. Unusable or conflicting records remain until you use Forget saved settings, which keeps the current conversion on screen. Copy result copies the displayed headline without digit-grouping commas; each visible conversion row has its own Copy button. Displayed and copied values round to twelve significant digits. If native copying fails, a complete selectable summary identifies the input, selected pair and conventions and includes every unit in the category, including uncommon units.
Does anything I type leave the browser?: Your input and converted values are calculated in the browser and are not uploaded by the converter. The definitions arrive with the page, so conversion needs no external data lookup and keeps working offline after the page has loaded. The core conversion needs no account.

Results round to 12 significant digits using the listed unit conventions. Many factors are exact definitions; psi and parsec use rounded coefficients. Temperature includes scale offsets. Days and weeks are fixed-duration units, and unit conversion does not determine calendar dates, ambient pressure or a software label’s convention.