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FILE SIZE

File Size and Unit Sizes

File Size Informaion


This tool will convert file size from one unit of measure to another.
Enter the file size in the field below and specifiy the measure units in the drop box.


Try also the free Download Time Calculator

File size measures the size of a computer file and is typically measured in bytes with a prefix. The smallest unit in computers is bit and comes from binary digit. A bit has only two digits - zero and one. The zero is also known as false (off) state and the one is known as true (on).

The bits are combined in groups in order to form larger units. The next unit larger than the bit is the byte which is formed by the combination of eight bits and can represent a value from 0 to 255 which is 2 to the power of 8 - all the possible combinations of the 8 bits that it includes.

The next larger units after the byte are named kilobyte, megabyte, gigabyte, terrabyte and so on which lead to great deal of confusion. Though the kilo prefix in the metric system means 1000 (e.g grams) in computers it means 1024 (e.g. bytes). In order to correct this mess the International Electrotechnical Commission (IEC) approved a new IEC International Standard in December 1998.

File Size

Folder Size is a free drive size analyzer tool that will list the sizes of all folder and files on your computer's hard drives, USB drives, CDROMs, Floppy disks and network shares. Download this freeware tool and check the distribution of your disk dspace.

 

Here is a list of some of the commonly used units in the metric and their corresponding IEC binary prefixes:

Name Size   Name Size
kilobyte (kB) 10 3   kibibyte (KiB) 2 10
megabyte (MB) 10 6   mebibyte(MiB) 2 20
gigabyte (GB) 10 9   gibibyte (GiB) 2 30
terabyte (TB) 10 12   tebibyte (TiB) 2 40
petabyte (PB) 10 15   pebibyte (PiB) 2 50
exabyte (EB) 10 18   exbibyte (EiB) 2 60
zettabyte (ZB) 10 21   zebibyte (ZiB) 2 70
yottabyte (YB) 10 24   yobibyte (YiB) 2 80

File sizes are limited by the file system that is used and its implementation. Here are details on the common file systems:

  FAT16 FAT32 NTFS
Maximum File Size 2 32 - 1 bytes 2 32 - 1 bytes 2 64 - 1 KB
Maximum Volume Size 4 GB 32 GB 2 64 clusters
Files Per Volume 2 16 2 22 2 32 - 1





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