how many mb to gb
They use 1024 (210) megabytes per gigabyte, but this is more properly called a gigabinary byte (GiB), sometimes contracted to gibibyte. Standard definition Officially, there are 1000 (103) megabytes (MB) in a gigabyte (GB). So 500MB would equal 0.5 GB. <br /><br /> This definition is used in hard drives, portable memory drives (memory cards, USB drives), DVDs, Blu-ray disks, and most measures of performance.