Multipliers

Main table // Powers of 2

The International System of Units (SI) defines

  kilo → 103
  mega → 106
  giga → 109
  tera → 1012
  peta → 1015
  ...

So, strictly speaking, 1 KB must be 1,000 Bytes, 1 MB must be 1,000,000 Bytes, ... but we accustomed to think that 1 KB is 1,024 Bytes.

In 1998 the IEC (International Electrotechnical Commission) published standards for binary prefixes, requiring that the kilobyte strictly denote 1000 bytes, and if you want it to be 1024 bytes, call it kibibyte. By the end of 2007, the IEC Standard had been adopted by the IEEE, EU, and NIST, and in 2009 it was incorporated in the International System of Quantities.

So, keep in mind and try to apply the following table.

Decimal Value, bytes Metric Name 1000 kB kilobyte 10002 MB megabyte 10003 GB gigabyte 10004 TB terabyte 10005 PB petabyte 10006 EB exabyte 10007 ZB zettabyte 10008 YB yottabyte

Binary Value, bytes IEC JEDEC 1024 210 KiB kibibyte KB kilobyte 10242 220 MiB mebibyte MB megabyte 10243 230 GiB gibibyte GB gigabyte 10244 240 TiB tebibyte TB terabyte 10245 250 PiB pebibyte PB petabyte 10246 260 EiB exbibyte EB exabyte 10247 270 ZiB zebibyte ZB zettabyte 10248 280 YiB yobibyte YB yottabyte

Just FYI: The JEDEC memory standards are the specifications for semiconductor memory circuits and similar storage devices promulgated by the JEDEC (Joint Electron Device Engineering Council) Solid State Technology Association, a semiconductor trade and engineering standardization organization.

Powers of 2

20 1 21 2 22 4 23 8 24 16 25 32 26 64 27 128 28 256 29 512 210 1024 211 2048 212 4096 213 8192 214 16,384 215 32,768 216 65,536

217 131,072 218 262,144 219 524,288 220 1,048,576 221 2,097,152 222 4,194,304 223 8,388,608 224 16,777,216 225 33,554,432 226 67,108,864 227 134,217,728 228 268,435,456 229 536,870,912 230 1,073,741,824 231 2,147,483,648 232 4,294,967,296 233   8,589,934,592