1 bit 0.125 (0 or 1/on or off)
1 nibble 0.5
8bits 1
1 kilobyte 1,024
1 megabyte 1,018,576
1 gigabyte 1,073,741,824 (over one billion)
1 Terabyte 1.099,511,627,776 (over one quadrillion)
1 exabyte 1,152,921,504,606,846,976 (don't ask)
1 zettabyte 1,180,591,620,717,411,303,424 (it's ridiculous)
1 yottabyte 1,208,925,819,614,629,179,706,176 ( I can't do it
)
Approximate equivalent
10 bytes one word
2 kilobytes one page of type written text
10 kilobytes one page of a reference book
1 megabyte a short novel
5 megabytes the complete works of shakespeare
100 megabytes one metre of books on a shelf
250 megabytes the total ouput of data per year for every person on earth
500 megabytes a CD-ROM
20 gigabytes the complete works of beethoven on CD
10 terabytes All the printed works in the US library of congress. (the worlds largest)
1 petabyte
Everything ever printed1 yottabyte
Every word ever spoken 
