Minggu, 03 Maret 2013

Conversion: bits and bytes

Name Symbol Before the standardization After the standardization
bit b 1 bit = 1 bit 1 bit = 1 bit
byte B 1 B = 8 bit 1 B = 8 bit
kilobit kbit / kb 1 kbit = 1024 bit 1 kBit = 1000 bit
Kibibit KiBit         1 KiBit = 1024 bit
kilobyte kB 1 kB = 1024 B = Byte 1 kB = 1000 Byte
kibibyte KiB         1 KiB = 1024 Byte
megabit MBit / Mb 1 MBit = 1024 KBit 1 MBit = 1000 kBit
mebibit MiBit / Mib         1 Mib = 1024 KiBit
megabyte MB 1 MB = 1024 kB 1 MB = 1000 kB
Mebibyte MiBit / MiB         1 MiB = 1024 KiB
gigabit GBit / Gb 1 GBit = 1024 MBit 1 GBit = 1000 MBit
gibibit GiBit / Gib         1 Gib = 1024 MiBit
gigabyte GB 1 GB = 1024 MB 1 GB = 1000 MB
gibibyte GiB         1 GiB = 1024 MiB
terabyte TB 1 TB = 1024 GB 1 TB = 1000 GB
tebibyte TiB         1 TiB = 1024 GiB
petabyte PB 1 PB = 1024 TB 1 PB = 1000 TB
pebibyte PiB         1 PiB = 1024 TiB
exabyte EB 1 EB = 1024 PB 1 EB = 1000 PB
exbibyte EiB         1 EiB = 1024 PiB
zettabyte ZB 1 ZB = 1024 EB 1 ZB = 1000 EB
zebibyte ZiB         1 ZiB = 1024 EiB
yottabyte YB 1 YB = 1024 ZB 1 YB = 1000 ZB
yobibyte YiB         1 YiB = 1024 ZiB
    Old Definitions:
  • 1 kb = (210) bits = 1,024 bits
  • 1 MB = (210)2 Bytes = 1,048,576 Bytes
    Name Prefix Symbol Factor
    kilobinary kibi Ki 210
    megabinary mebi Mi (210)2
    gigabinary gibi Gi (210)3
    terabinary tebi Ti (210)4
    petabinary pebi Pi (210)5
    exabinary exbi Ei (210)6
     
  • 1 kilo-bit = 1 kb = 103 bits = 1,000 bits
  • 1 kilobinarybit = 1 kibibit = 1 Kib =210 bits = 1,024 bits
  • 1 megabyte = 1 MB = 106 Bytes = 1,000,000 Bytes
1 megabinarybyte = 1 mebibyte = 1 MiB = (210)2 Bytes = 1,048,576 Bytes
Connection
  
Theoretical
rate in KBit
  
Optimal
rate in KByte
  
Probable
rate in KByte
14.4 modem   14.4 kbit/s   1.2 KByte/s     1 KByte/s
28.8 modem   28.8 kbit/s   2.4 KByte/s     2 KByte/s
33.6 modem   33.6 kbit/s      3 KByte/s   2.5KByte/s
56 k  modem      53 kbit/s   4.8 KByte/s     4 KByte/s
Single ISDN      64 kbit/s   6 KByte/s     5 KByte/s
Dual ISDN   128 kbit/s   12 KByte/s   10 KByte/s
DSL - light   384 kbit/s   35 KByte/s   30 KByte/s
DSL   1024 kbit/s   125 KByte/s   90 KByte/s
DSL   2048 kbit/s   250 KByte/s   180 KByte/s
DSL   3072 kbit/s   500 KByte/s   360 KByte/s
T1   1,54 Mbis/s   150 KByte/s   50 Kbyte/s
Cable modem     6 Mbits/s   300 KByte/s   50 KByte/s
Intranet / LAN   10 Mbits/s   350 KByte/s   35 KByte/s
100 base-T Lan   100 Mbits/s   500 KByte/s   50 KByte/s
 
The new IEC Standard
bit bit 0 or 1
byte B 8 bits
kibibit Kibit 1024 bits
kilobit kbit 1000 bits
kibibyte (binary) KiB 1024 bytes
kilobyte (decimal) kB 1000 bytes
megabit Mbit 1000 kilobits
mebibyte (binary) MiB 1024 kibibytes
megabyte (decimal) MB 1000 kilobytes
gigabit Gbit 1000 megabits
gibibyte (binary) GiB 1024 mebibytes
gigabyte (decimal) GB 1000 megabytes
terabit Tbit 1000 gigabits
tebibyte (binary) TiB 1024 gibibytes
terabyte (decimal) TB 1000 gigabytes
petabit Pbit 1000 terabits
pebibyte (binary) PiB 1024 tebibytes
petabyte (decimal) PB 1000 terabytes
exabit Ebit 1000 petabits
exbibyte (binary) EiB 1024 pebibytes
exabyte (decimal) EB 1000 petabytes
 
File Storage Capacity by Bits and Bytes
  bit byte Kilobyte Megabyte Gigabyte
bit 1 0.125 0.000122070312 1.192092895 × 10-7 1.16415321875 × 10-10
byte 8 1 0.0009765625 9.53674316 × 10-7 9.31322575 × 10-10
Kilobyte 8 192 1 024 1 0.0009765625 9.53674316 × 10-7
Megabyte 8 388 608 1 048 576 1 024 1 0,0009765625
Gigabyte 8,589,934,592 1,073,741,824 1,048,576 1,024 1
Terabyte 8,796,093,022,208 1,099,511,627,776 1,073,741,824 1,048,576 1,024
Petabyte 9,007,199,254,740,990 1,125,899,906,842,624 1,099,511,627,776 1,073,741,824 1,048,576
Exabyte 9,223,372,036,854,780,000 1,152,921,504,606,846,976 1,125,899,906,842,624 1,099,511,627,776 1,073,741,824
Zettabyte 9,444,732,965,739,290,000,000 1,180,591,620,717,411,303,424 1,152,921,504,606,846,976 1,125,899,906,842,624 1,099,511,627,776
 
CD: 2 · 44100 · 16 = 1,4112 MBit/s : 8 bit/byte = 176,4 kbyte/s
2 · 44100 · 20 = 1,764 MBit/s : 8 bit/byte = 220,5 kbyte/s
2 · 44100 · 24 = 2,1168 MBit/s : 8 bit/byte = 264,6 kbyte/s
2 · 48000 · 24 = 2,304 MBit/s : 8 bit/byte = 288,0 kbyte/s
 
These words are generally not accepted.
Units from Amendment 2 - International Standard IEC 60027-2
Prefix Symbol Power Factor
Yotta Y 1024 1,000,000,000,000,000,000,000,000
Zetta Z 1021 1,000,000,000,000,000,000,000
Exbi Ei 250 1,152,921,504,606,846,976
Exa E 1018 1,000,000,000,000,000,000
Pebi Pi 250 1,125,899,906,842,624
Peta P 1015 1,000,000,000,000,000
Tebi Ti 240 1,099,511,627,776
Tera T 1012 1,000,000,000,000
Gibi Gi 230 1,073,741,824
Giga G 109 1,000,000,000
Mebi Mi 220 1,048.576
Mega M 106 1,000,000
Kibi Ki 210 1,024
Kilo k 103 1,000
Reference unit   100 1
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