Megabytes to Gigabytes converter

Quick reference

Megabytes	Gigabytes
1	0.001
2	0.002
5	0.005
10	0.01
20	0.02
25	0.025
50	0.05
100	0.1
250	0.25
500	0.5
1,000	1

About digital storage units

Digital storage has two competing systems that look alike: decimal units (kilobyte = 1,000 bytes) used by drive manufacturers, and binary units (kibibyte = 1,024 bytes) used by operating systems for memory. That gap is why a "1 TB" drive shows up as roughly 931 GiB in Windows: both numbers are right, they just use different definitions. This converter handles both families, so you can translate marketing gigabytes into the gibibytes your OS reports.

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Frequently asked questions

What is the exact formula for Megabytes to Gigabytes?

Multiply the Megabytes value by 0.001. This comes from the exact unit definitions, not a rounded approximation.

Is this conversion exact?

The underlying ratio is exact where a legal definition exists (for example, 1 inch = 25.4 mm exactly). Displayed results are rounded to six decimal places for readability.

Can I convert Gigabytes back to Megabytes?

Yes. Use the reverse converter linked below, or just swap which field you type into: the live converter recalculates either direction.