Systeme International (SI) units
Prefix used in SI units
Unit Conversion Calculator

Systeme International (SI) units

Quantity Name of Unit Notation Dimension
Base Units
Length meter m m
Mass kilogram kg kg
Time second s s
Temperature Kelvin K K
Amount of substance kmole kmol kmol (nondimension)
Electrical current Ampere A A
Luminous intensity candela cd cd
Supplementary Units
Plane angle radian rad rad (nondimension)
Solid angle steradian st st (nondimension)
Derived Units
Area
m2 m2
Volume
m3 m3
Density
kg m-3 kg m-3
Velocity(speed)
m s-1 m s-1
Angular velocity
rad s-1 rad s-1
Acceleration
m s-2 m s-2
Wavelength
m m
Wavenumber
m-1 m-1
Force Newton N kg m s-2
Pressure Pascal Pa kg m-1 s-2
Energy Joule J kg m2 s-2
Power Watt W kg m2 s-3
Frequency Hertz Hz s-1
Specific heat capacity
J kg-1 K-1 m2 s-2 K-1
Vorticity
s-1 s-1
Divergence
s-1 s-1

Prefix used in SI Units

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

Unit Conversion

General Conversion Factors

International System of Units (SI)

http://physics.nist.gov/Pubs/SP811/contents.html : Guide for the Use of the International System of Units (SI)
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