The 11th Conférence Générale des Poids et Mesures (CGPM),

considering

decides

1. the system founded on the six base units above is called the "Système International d'Unités";
2. the international abbreviation of the name of the system is SI;
3. names of multiples and submultiples of the units are formed by means of the following prefixes:




Multiplying factor			Prefix	Symbol		Multiplying factor			Prefix	Symbol
1 000 000 000 000	= 1012		tera	T		0.1	= 10–1		deci	d
1 000 000 000	= 109		giga	G		0.01	= 10–2		centi	c
1 000 000	= 106		mega	M		0.001	= 10–3		milli	m
1 000	= 103		kilo	k		0.000 001	= 10–6		micro	µ
100	= 102		hecto	h		0.000 000 001	= 10–9		nano	n
10	= 101		deca	da		0.000 000 000 001	= 10–12		pico	p



4. the units listed below are used in the system, without excluding others which might be added later.

Supplementary units

area	square metre	m2
volume	cubic metre	m3
frequency	hertz	Hz	1/s
mass density (density)	kilogram per cubic metre	kg/m3
speed, velocity	metre per second	m/s
angular velocity	radian per second	rad/s
acceleration	metre per second squared	m/s2
angular acceleration	radian per second squared	rad/s2
force	newton	N	kg · m/s2
pressure (mechanical stress)	newton per square metre	N/m2
kinematic viscosity	square metre per second	m2/s
dynamic viscosity	newton-second per square metre	N · s/m2
work, energy, quantity of heat	joule	J	N · m
power	watt	W	J/s
quantity of electricity	coulomb	C	A · s
tension (voltage), potential difference, electromotive force	volt	V	W/A
electric field strength	volt per metre	V/m
electric resistance	ohm		V/A
capacitance	farad	F	A · s/V
magnetic flux	weber	Wb	V · s
inductance	henry	H	V · s/A
magnetic flux density	tesla	T	Wb/m2
magnetic field strength	ampere per metre	A/m
magnetomotive force	ampere	A
luminous flux	lumen	lm	cd · sr
luminance	candela per square metre	cd/m2
illuminance	lux	lx	lm/m2