Manual Pages  — ORDERS

orders – orders of magnitude

DESCRIPTION SEE ALSO STANDARDS AUTHORS

The following table lists common multiples of bytes. "Kilobyte" "Prefix" "Power of 2" "Power of 10"

Name	Prefix	Power of 2	Power of 10
Kilobyte	kB	2^10	10^3
Megabyte	MB	2^20	10^6
Gigabyte	GB	2^30	10^9
Terabyte	TB	2^40	10^12
Petabyte	PB	2^50	10^15
Exabyte	EB	2^60	10^18
Zettabyte	ZB	2^70	10^21
Yottabyte	YB	2^80	10^24

The following table lists common bit rates as a power of ten. "Megabit per second" "Prefix" "Bit per second" "Byte per second"

Name	Prefix	Bit per second	Byte per second
Bit per second	bit/s	1	0.125
Byte per second	B/s	8	1
Kilobit per second	kbit/s	10^3	125
Kilobyte per second	kB/s	8 * 10^3	1000
Megabit per second	Mbit/s	10^6	125000
Megabyte per second	MB/s	8 * 10^6	1000000
Gigabit per second	Gbit/s	10^9	125000000
Gigabyte per second	GB/s	8 * 10^9	1000000000
Terabit per second	Tbit/s	10^12	125000000000
Terabyte per second	TB/s	8 * 10^12	1000000000000

The following table lists common orders of magnitude as a power of ten. "Septillionth" "Order" "Prefix" "Symbol" "Decimal"

Name	Order	Prefix	Symbol	Decimal
Septillionth	10^-24	yocto	y	0.000000000000000000000001
Sextillionth	10^-21	zepto	z	0.000000000000000000001
Quintillionth	10^-18	atto	a	0.000000000000000001
Quadrillionth	10^-15	femto	f	0.000000000000001
Trillionth	10^-12	pico	p	0.000000000001
Billionth	10^-9	nano	n	0.000000001
Millionth	10^-6	micro	mu	0.000001
Thousandth	10^-3	milli	m	0.001
Hundredth	10^-2	centi	c	0.01
Tenth	10^-1	deci	d	0.1
One	10^0	-	-	1
Ten	10^1	deca	da	10
Hundred	10^2	hecto	h	100
Thousand	10^3	kilo	k	1000
Million	10^6	mega	M	1000000
Billion	10^9	giga	G	1000000000
Trillion	10^12	tera	T	1000000000000
Quadrillion	10^15	peta	P	1000000000000000
Quintillion	10^18	exa	E	1000000000000000000
Sextillion	10^21	zetta	Z	1000000000000000000000
Septillion	10^24	yotta	Y	1000000000000000000000000

There have been various attempts to standardize the set of binary prefixes. Organizations such as International Electrotechnical Commission ( IEC) have proposed new prefixes such as "kibi", "mebi", "gibi", and "yobi", but the adoption has been slow at best.

This manual page was written by Jukka Ruohonen <Mt jruoho@netbsd.org>.