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Decimal multiples and submultiples of SI units

Multiple	Prefix	Symbol
10²⁴	yotta	Y
10²¹	zetta	Z
10¹⁸	exa	E
10¹⁵	peta	P
10¹²	tera	T
10⁹	giga	G
10⁶	mega	M
10³	kilo	k
10²	hecto	h
10¹	deca	da

Submultiple	Prefix	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	yocto	y

References

Comptes Rendus de la 11^e CGPM (1960), 1961 (p. 87).
Comptes Rendus de la 12^e CGPM (1964), 1965 (p. 94).
Comptes Rendus de la 19^e CGPM (1991), 1992 (p. 185).

See also