NOTE 1 – The list of approved SI prefixes is given in the following table:

Multiples			Submultiples
Factor	Prefix		Factor	Prefix
	Name	Symbol		Name	Symbol
101	deca	da	10–1	deci	d
102	hecto	h	10–2	centi	c
103	kilo	k	10–3	milli	m
106	mega	M	10–6	micro	μ
109	giga	G	10–9	nano	n
1012	tera	T	10–12	pico	p
1015	peta	P	10–15	femto	f
1018	exa	E	10–18	atto	a
1021	zetta	Z	10–21	zepto	z
1024	yotta	Y	10–24	yocto	y

NOTE 2 – When the prefixes are used, the prefix name and the unit name are combined to form a single word, and similarly the prefix symbol and the unit symbol are written without any space to form a single symbol, which may itself be raised to any power. For example, we may write: kilometre, km; microvolt, μV; femtosecond, fs; 50 V/cm = 50 V (10^–2 m)^–1 = 5000 V/m. See the SI Brochure for more information.

NOTE 3 – As an exception, multiples and submultiples of the kilogram are written by combining a prefix with the gram, such we write: milligram, mg, not microkilogram, µkg.