Computer Storage Sizes Explained

How many Megabytes are in a Gigabyte? How many Gigabytes are in a Terabyte? Chances are these are the types of questions you have asked yourself when buying a new computer, MP3 player or just about anything that uses digital storage. Unfortunately sales assistants like to rip people off to line their pockets with that juicy commission, so things like computer storage sizes are a good thing to know when buying any electronic goods. The good news is computer storage sizes are easy!


Computer Storage Sizes Explained

  • 8 bits = 1 Byte
  • 1024 Bytes = 1 Kilobyte
  • 1024 Kilobytes = 1 Megabyte
  • 1024 Megabytes = 1 Gigabyte
  • 1024 Gigabytes = 1 Terabyte
  • 1024 Terabytes = 1 Petabyte

Put simply any computer storage sizes go up in multiples of 1024 once you get past the measurement of Bytes. Just remember 1024 and you’re good to go!

Storage sizes are often abbreviated, here is a list of abbreviations used:

  • B = bytes
  • KB = kilobytes
  • MB = megabytes
  • GB = gigabytes
  • TB = terabytes
  • PB = petabytes

Some of you now may be thinking “But this doesn’t make sense!!!! I don’t have anything to compare these sizes to”. To clear things up:

  • A song saved on your computer as an MP3 would be roughly 6 Megabytes (MB)
  • A movie saved on your computer would be roughly 1 Gigabyte (GB)
  • I written document saved on your computer would be roughly 50 kilobytes (KB)
  • To view how large a file is you can right click on it and go to properties.

The longer your movie, song or text document is, the larger it will be. The above sizes are a rough average to give you an idea on what to expect.