MB to GB Converter

How MB to GB works

Convert megabytes to gigabytes instantly. 1 MB = 0.001 GB, with a live result and a quick reference table. Everything happens inside this page: the tool reads your input, runs the calculation or conversion locally, and hands the result back to you. Nothing is transmitted, because there is no backend to transmit it to.

That design choice is deliberate. Most free tool sites upload your files to a server, process them there, and quietly keep a copy. Toolcin cannot do that — the site is a set of static files. If your connection dropped the moment the page finished loading, every tool would still work.

Decimal megabytes, the storage convention

This page uses the decimal definition: 1 GB = 1,000 MB, so megabytes to gigabytes divides by 1,000. That is the convention drive manufacturers, ISPs and most specifications use.

A 500 MB download is 0.5 GB. A 4,700 MB game is 4.7 GB. Both answers are exact under this definition, which is why the arithmetic looks almost too easy.

The 1024 problem

Windows reports file sizes using 1024-based units but labels them “MB” and “GB”. A drive sold as 500 GB shows as roughly 465 GB in Explorer, and a “1 GB” file may appear as 953 MB. The number is not wrong — the label is.

The unambiguous names are MiB and GiB for the 1024-based units. This tool uses MB and GB in the decimal sense; if your source is a Windows file property, use the binary page instead or expect a 4.9% difference per step.

Data plans and uploads

Mobile operators and hosting providers bill in decimal units, so a “5 GB” plan really is 5,000 MB — and a phone that counts in binary will show the same usage as about 4.66 GB. When a bill and a phone disagree by 5–7%, this is almost always why.

For upload limits, the form usually means decimal too. A 100 MB cap accepts a 100,000,000-byte file, which a binary-labelled file manager will call 95.4 MB.

Good to know

• Works offline once loaded, including on flights and in locked-down networks.
• No file size limit beyond your device's own memory.
• Free to use, with no account and no usage counter.
• Results are produced locally, so they are not logged or shared with anyone.

Questions