Israel Science and Technology Directory

SI unit prefixes

The prefixes listed in the table are used to form decimal multiples and sub-multiples of SI Units. The prefixes may be used with any of the 29 SI units with special names with the exception of the base unit kilogram that is the only SI unit with a prefix as part of its name and symbol.

Prefixes for SI unit
Multiples

Factor	Name	Symbol
101	deca	da
102	hecto	h
103	kilo	k
106	mega	M
109	giga	G
1012	tera	T
1015	peta	P
1018	exa	E
1021	Zetta	Z
1024	Yotta	Y

Prefixes for SI unit
Sub-multiples

Factor	Name	Symbol
10 −1	deci	d
10 −2	centi	c
10 −3	milli	m
10 −6	micro	μ
10 −9	nano	n
10 −12	pico	p
10 −15	femto	f
10 −18	atto	a
10 −21	zepto	z
10 −24	yotta	y

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Source: Table 7 of Official SI Brochure