Præfix

10¹²	1.000.000.000.000	(T) Tera
10⁹	1.000.000.000	(G) Giga
10⁶	1.000.000	(M) Mega
10³	1.000	(K) Kilo
10²	100
10¹	10
10⁰	1
10^-1	0,1
10^-2	0,01
10^-3	0,001	(m) mili
10^-6	0,000001	( m ) mikro
10^-9	0,000000001	(n) nano
10^-12	0,000000000001	(p) pico

	10¹²	10⁹	10⁶	10³	-	10^-3	10^-6	10^-9	10^-12
	000	000	000	000	000,	000	000	000	000
	T	G	M	K	-	m	m	n	p

Eks.: (lommeregner)

25 · 10^-9 · 15 · 10⁹ ( 0,000000025 · 15000000000 )

25
EE
+/-
9
x
15
EE
9
=

K (Kilo = 10³) · m (mikro = 10^-6) = m (milli = 10^-3)

K (Kilo = 10³) : m (mikro = 10^-6) = G (Giga = 10⁹)

m (milli = 10^-3) · M (Mega = 10⁶) = K (Kilo = 10³)

m (milli = 10^-3) : M (Mega = 10⁶) = n (nano = 10^-9)