Megabytes (MB) to Gigabytes (GB) converter

Type a value in either box and the other fills in instantly — no button, no waiting.

Type in either box — the other updates instantly.

Quick reference

Megabytes (MB)Gigabytes (GB)
1 megabytes (mb)0.001 gigabytes (gb)
2 megabytes (mb)0.002 gigabytes (gb)
5 megabytes (mb)0.005 gigabytes (gb)
10 megabytes (mb)0.01 gigabytes (gb)
25 megabytes (mb)0.025 gigabytes (gb)
50 megabytes (mb)0.05 gigabytes (gb)
100 megabytes (mb)0.1 gigabytes (gb)

About this tool

In the decimal system drive makers use, 1 GB = 1,000 MB. Operating systems often report in gibibytes instead (1 GiB = 1,024 MiB), which is why a "500 GB" drive shows about 465 in Windows. This converter uses the decimal definition. Like every tool on this site, the conversion happens on your device — the numbers you type never leave your browser.

Common questions

How do I convert megabytes to gigabytes by hand? In the decimal system drive makers use, 1 GB = 1,000 MB. Operating systems often report in gibibytes instead (1 GiB = 1,024 MiB), which is why a "500 GB" drive shows about 465 in Windows. This converter uses the decimal definition.

Is this converter exact? It uses the standard defined conversion factors and rounds the display to at most 6 decimal places — more precision than any tape measure, scale, or recipe can use.

Private by design: this tool runs entirely in your browser. Nothing you type or open here is uploaded, stored, or tracked.