Tables :  SI System

SI System - The International System of Units, which is based upon sevel basic quantities:

Basic Units in the SI System

Physical Quantity
Length
Mass
Time
Temperature
Electric current
Luminous intensity
Amound of substance

      

Name of Unit
meter
kilogram
second
Kelvin
ampere
candela
mole

      

Symbol
m
kg
s
K
amp
cd
mol

Non-SI Units in Common Use

Physical Quantity
Volume
Length
Pressure

Energy

Temperature
Concentration		       Name of Unit
liter
angstrom
atmosphere
torr
calorie
electron volt
degree Celcius
molarity		       Symbol
L (10-3 m3)
Å (0.1 nm)
atm (101.325 kPa)
mmHg (133.32 Pa)
cal (4.184 J)
ev (1.6022 x 10-19 J)
C (K -273.15)
M (mol/L)

Common Derived Units in SI

Physical Quantity
Energy
Frequency
Force
Pressure
Power
Electric charge
Electric potential
Electric resistance
Electric conductance
Electric capacitance		       Name of Unit
joule
hertz
newton
pascal
watt
coulomb
volt
ohm
siemens
farad		       Symbol
J (kg-m2/s2)
Hz (cycles/s)
N (kg-m/s2)
P (N/m2)
W (J/s)
C (amp-s)
V (J/C)
(V/amp)
S (amp/V)
F (C/V)

Fractions and Multipliers for Use in SI

Prefix     Symbol     Multiple       Prefix     Symbol     Multiple
exa

E

1018

 deci

d

10-1
peta

P

1015

 centi

c

10-2
tera

T

1012

 milli

m

10-3
giga

G

109

 micro

u

10-6
mega

M

106

 nano

n

10-9
kilo

k

103

 pico

p

10-12
hecto

h

102

 femto

f

10-15
deka

da

101

 atto

a

10-18