Bytes to mb: In your example for

In your example for Range 1, you are correct. That is the size of the memory, stated in hexidecimal, in bytes . You may gain the most insight by first converting 00FF FFFF to a decimal number, then converting that number of bytes into megabytes. To convert from bytes to megabytes use the relationship 1 MB = 1 Megabyte = 1024 " 1 KB = 1,048,576 bytes . There are tons of online Hex to Decimal converters. The calculator built in to Windows can also do the conversion. For the other ranges, you ... The term MB changed it's definition when some operating systems reported data sizes calling Mega bytes as 1,000,000 bytes which is different than what the disk manufacturers were calling Megabytes. For a variety of reasons, the industry standardized on Megabyte ( MB ) being 10^6 or 1,000,000 bytes , not 2^20 bytes . 1KB表示1K个Byte，也就是1024个字节。 MB：计量单位中的M (兆)是10的6次方，见到M自然想起要在该数值的后边续上六个0，即扩大一百万倍。 在二进制中，MB也表示到了百万级的数量级，但1MB不正好等于1000000字节，而是1048576字节，即 1MB = 2E+20 Bytes = 1048576Bytes。 @fiat in case someone decides to give the UnitsNet package a try, there's the Information class that implements the FromBytes method, which allows you to convert from bytes to another unit, e.g. double result = Information.FromBytes(1547821).Megabytes; => this will return 1.547 ( MB ).