THE INTERNATIONAL SYSTEM OF UNITS
|
Quantity
|
Unit
Name |
SI
Symbol |
Other
permissible units |
|
Length
|
meter |
m |
- |
|
Mass |
Kilogram
|
kg |
- |
|
Time |
second |
s |
- |
|
Temperature |
Kelvin |
K |
°C
(Celsius) |
|
Angle
|
radian |
rad |
Degree |
|
Distance
|
meter |
m |
m |
|
Area
|
Square
meter |
- |
M² |
|
Volume |
Metre
cubed |
- |
M³ |
|
Force |
Newton |
N |
Kg.
m/s² |
|
Energy
or work |
joule |
J |
N-m |
|
Stress
or pressure |
Pascal
|
Pa |
N/m² |
|
Power |
watt |
W |
j/s
or N-m/s |
|
Torque
or moment |
Newton
meter |
- |
N-m |
|
Section
modulus |
Meter
cubed |
- |
M³ |
|
Moment
of inertia |
Metre
to the forth power |
- |
M4 |
|
Frequency
|
hertz |
Hz |
Cycle/s |
|
Rotation
speed |
Radian
/second |
- |
Rad/s |
|
Density
|
Kilogram/cu.m. |
- |
Kg/m³ |
|
Specific
weight |
Newton/cu.m. |
- |
N/m³ |
|
|
|
|
|
|
Prefix |
SI symbol |
Factor |
|
Giga |
G |
109 |
|
mega |
M |
106 |
|
Kilo |
K |
10³ |
|
Centi |
C |
10-2 |
|
milli |
m |
10-3 |
|
micro |
- |
10-6 |
|
nano |
n |
10-9 |
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