Table 176: SI Base Units and Derived SI Units. Add the SI prefixes in Table 177 on page 286 to the SI
Base Units in this table to create compound terms (Derived SI Units). This table contains all the base
units, but only a sampling of derived units. (continued)
Mass
kilogram
Time
second
Electric Current
ampere
Thermodynamic Temperature
kelvin
Amount of Substance
mole
Luminous Intensity
candela
Examples of Derived SI Units
One thousand meters
kilometer
Thousandth of a second
millisecond
Millionth of an ampere
microampere
Table 177: Mathematical power-to-common term comparison (American system). Use these prefixes with
the base SI units in Table 176 on page 285 to create compound algebraic and mathematical terms,
called "derived SI units."
Prefix
Equivalent (American) Ordinal
Number
Mathematical Power
yotta
septillion
10
24
zetta
sextillion
10
21
exa
quintillion
10
18
peta
quadrillion
10
15
tera
trillion
10
12
giga
billion
10
9
mega
million
10
6
kilo
thousand
10
3
____
____
10
milli
thousandth
10
–3
micro
millionth
10
–6
nano
billionth
10
–9
pico
trillionth
10
–12
femto
quadrillionth
10
–15
atto
quintillionth
10
–18
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