MB to GB Converter

This conversion translates a megabyte value into gigabytes using a fixed 1,024 divisor. One megabyte is 1,024 kilobytes. One gigabyte is 1,024 megabytes. That ratio stays fixed for any value entered, small or large.

This differs from a decimal-based (1,000-per-step) reading that some drive manufacturers use on packaging. Operating systems, file managers, and most developer tools report size using the 1,024-based convention this page uses. That is why an OS-reported GB figure is usually the number you want when the source value is in MB.

IEC 80000-13:2008 formalizes this binary convention, naming 1,024 megabytes a gibibyte to distinguish it from the decimal gigabyte. This page's MB and GB labels follow that same 1,024 basis, even though the interface keeps the familiar names. The gap between the two conventions is largest at this exact pair: over 7% at the gigabyte scale. Cloud backup dashboards and mobile data-usage screens both report against this same binary basis. That's why a GB figure there can look slightly different from a manufacturer's decimal spec sheet.

Divide the megabyte value by 1,024 to get the equivalent in gigabytes. The formula is GB = MB ÷ 1,024, applied the same way for every input on this page.

The division is exact integer math rather than an approximation, at any MB scale. Reversing it means multiplying a GB figure by 1,024 to get MB back, which is what the swap control triggers automatically.

Five figures below run the formula against a game patch, a video export, a decimal value, and the reverse GB-to-MB direction.

1,024 MB converts to exactly 1 GB, confirming the baseline every other value here scales from. A 2,500 MB game update, a common patch size on consoles and PC, converts to about 2.44 GB. A 15,000 MB video export, roughly a feature-length film at moderate compression, converts to about 14.65 GB. Going the other way, 2 GB converts back to exactly 2,048 MB, matching the swap control's output for the same pair. On the smaller end, a 300 MB high-bitrate podcast episode converts to roughly 0.293 GB. That barely registers against a modern phone's storage capacity.

Dividing by 1,024 in code produces the same result as this converter, since both use integer powers of 1,024 rather than floating-point approximations. This comes up whenever an app needs to display a download size or storage quota in GB instead of MB.

These functions return the same figure this page displays, since both use the 1,024 divisor. For GB-to-MB, multiply by 1,024 instead, the same operation the swap control triggers. Save rounding, such as `toFixed(2)`, for the last step, not before another calculation runs on the result.

A video file's Base64-encoded copy runs about a third larger than the original MB or GB figure. ToolkitWizard's Base64 Encoder shows that inflation directly, rather than leaving it to guesswork. Hashing doesn't inflate anything: a SHA-256 digest stays 32 bytes whether the source is 100 MB or 100 GB. ToolkitWizard's Hash Generator confirms that fixed output length in seconds.

function mbToGb(mb) {
  return mb / 1024;
}
// mbToGb(2500) -> 2.44140625

def mb_to_gb(mb):
    return mb / 1024
# mb_to_gb(2500) -> 2.44140625

Integer math at the 1,024 step keeps the MB-to-GB result exact at any scale this converter handles, in both conversion directions. There's no accumulated rounding error to worry about.

The megabyte figure you type stays on your device the whole time. This calculator has no backend to call, so there's no server log that could capture it either.

ToolkitWizard doesn't set a cookie or fire an analytics event tied to a specific conversion here. The same holds on every other measurement tool on the site. Reload the page and the field clears instantly, since the value only ever lived in the browser's own memory.

Using a 1,000 divisor where 1,024 belongs is the top mistake on this pair. It understates the GB figure by roughly 2.3% at this scale, more once sizes climb toward TB. Mixing up megabyte (MB) and megabit (Mb) is the second common slip, an eightfold gap rather than a rounding one.

Chaining several conversion steps, from megabytes up through terabytes, lets either mistake compound along the way. An intermediate rounding step before the final division adds error the direct formula above skips entirely. Running the original MB figure through this converter in one pass avoids that risk.

A fourth mistake worth flagging is treating every app's storage dashboard as using the same convention. Some cloud backup tools display decimal GB to match marketing figures. Device settings screens usually default to the binary reading this page uses instead. The same drive can end up showing two slightly different GB totals, depending on which screen is reporting it. Confusing a video's streaming bitrate with its eventual file size is a related trap. Bitrate needs multiplying by duration first, before it converts into a meaningful MB or GB figure at all.

This table covers common MB values from very small to six-figure inputs, each computed with the same 1,024 divisor used throughout this page.

Figures below 1 GB round to three decimal places, enough precision for everyday comparisons. A value not listed here is better run through the calculator above than estimated between two rows. The table itself only reads MB-to-GB, so start from a GB figure with the swap control instead.

This page is the dedicated home for MB-to-GB, and for GB-to-MB through the swap control. It carries a depth of examples and FAQs the all-units hub can't spare for one pair. The math matches the hub exactly, since both share the same 1,024 basis.

Every other high-volume pair on this cluster gets that same dedicated treatment, listed below rather than folded into this page. Each one stays focused on the single conversion its own visitors actually searched for.