Kilo, Mega, Giga, Tera, Peta, Exa, Zetta, Yotta physics. nist. gov/cuu/Units/binary.html Common use prefixes(all Sl, except K[k in SI] Name Abbr Factor sI size Kilo K|210=1,024 103=1,000 Mega M|20=1,048576 106=1,000,000 Giga G 230=1.073.741824 109=1,000,000,000 Tera T|240=1,099511627,776 1012=1,000,000,000,000 Peta P250=1,125,899,906,842,624 1015=1000000000,000.000 Exa E|20=1,152,921,504,606,846,976 1018=1,000,000,000,000,000,000 Zetta z20=118,591,0,717413424 1021=1000,00000000000000,000 YottaY|280=1,208,9258:19,614629,174,706,1761024=1,00000 Confusing! Common usage of“ kilobyte” means 1024 bytes, but the "correct"si value is 1000 bytes Hard Disk manufacturers Telecommunications are the only computing groups that use SI factors, so what is advertised as a 30 gb drive will actually only hold about 28 x 230 bytes, and a 1 Mbit/s connection transfers 106 bps CS61C L02 Number Re presentation(10) Garcia, Spring 2007CS61C L02 Number Representation (10) Garcia, Spring 2007 © UCB Kilo, Mega, Giga, Tera, Peta, Exa, Zetta, Yotta • Common use prefixes (all SI, except K [= k in SI]) • Confusing! Common usage of “kilobyte” means 1024 bytes, but the “correct” SI value is 1000 bytes • Hard Disk manufacturers & Telecommunications are the only computing groups that use SI factors, so what is advertised as a 30 GB drive will actually only hold about 28 x 2 30 bytes, and a 1 Mbit/s connection transfers 106 bps. Name Abbr Factor SI size Kilo K 2 10 = 1,024 103 = 1,000 Mega M 2 20 = 1,048,576 106 = 1,000,000 Giga G 2 30 = 1,073,741,824 109 = 1,000,000,000 Tera T 2 40 = 1,099,511,627,776 1012 = 1,000,000,000,000 Peta P 2 50 = 1,125,899,906,842,624 1015 = 1,000,000,000,000,000 Exa E 2 60 = 1,152,921,504,606,846,976 1018 = 1,000,000,000,000,000,000 Zetta Z 2 70 = 1,180,591,620,717,411,303,424 1021 = 1,000,000,000,000,000,000,000 Yotta Y 2 80 = 1,208,925,819,614,629,174,706,176 1024 = 1,000,000,000,000,000,000,000,000 physics.nist.gov/cuu/Units/binary.html