Explanation : The term gigabyte refers to 1024 megabytes. The gigabyte & megabyte are multiple of the unit byte for digital information. The prefix giga means 109 where as mega is a multiplier of 1000000 (106) in the International System of Units (SI). We can also convert Gigabyte into Megabyte as: 1 Gigabyte = 1000 megabytes (decimal) 1 GB = 103 MB in base 10 (SI) 1 Gigabyte is equal to 1024 megabytes (binary).1 GB = 210 MB in base 2