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Formatted Storage Capacity

258 Views 2 Replies Latest reply: Nov 21, 2012 9:05 PM by lvmedic3214 RSS
lvmedic3214 Level 4 Level 4 (1,565 points)
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Nov 21, 2012 8:51 PM

I noticed on my first iPhone 4 that the actual available space on it was around 14.29 gb This was a 16 gig phone. My iPad is a 32 gig and has about 29.39 gb of space. My iPhone 5 is a 64 GB and only has 57.30 gb of useable space. I know the operating system takes up a portion of the useable disk space but they all have the same operating system, so why the big difference in useable space?

iPhone 5, iOS 6.0.1, Verizon 64 GB
  • Kappy Level 10 Level 10 (221,010 points)
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    Nov 21, 2012 9:01 PM (in response to lvmedic3214)

    Actually, they don't have the same OS. But that aside it is simply a matter of arithmetic and the counting base


    The base used for marketing is Base 10 where a GB = 1,000,000,000 bytes.

    The base used in the computer is Base 2 where a GB = 1,073,741,824 bytes.


    The ratio of the two is 0.93132. So if you multiply 64 GBs by 0.93132 you get 59.6; 16 GBs goes to 14.9 GBs; and 32 is 29.8 GBs. This is the capacity of the storage prior to installing iOS and default apps.


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