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A kilobyte (kB) is a number used to measure storage space on computer hard drives or computer memory. A kilobyte originally meant 1000 bytes. Over time the meaning changed and today it is often used to mean 1024 bytes. This created some confusion as a "kilo" normally means 1000.[1] The International Electrotechnical Commission (IEC) now defines a kilobyte as being 1000 bytes.[2] According to the IEC, the correct name for 1,024 bytes is a kibibyte.[1]

One thousand kilobytes make one megabyte.


  1. 1.0 1.1 "World Wide Words: Kibibyte". 2011 [last update]. Retrieved 7 May 2011. 
  2. "Kilobyte - KB". 2011 [last update]. Retrieved 7 May 2011.