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| SI Base Units |
| Quantity |
Unit Symbol |
Unit Name |
| Length |
m |
meter |
| Mass |
kg |
kilogram |
| Time |
s |
second |
| Electric current |
A |
Ampere |
| Temperature |
K |
Kelvin |
| Luminous intensity |
cd |
candela |
| Decimal Multiples And Sub-Multiples |
| Factor |
Prefix |
Symbol |
| 1012 |
tera |
T |
| 109 |
giga |
G |
| 106 |
mega |
M |
| 103 |
kilo |
k |
| 102 |
hecto |
h |
| 10 |
deca |
da |
| 10-1 |
deci |
d |
| 10-2 |
centi |
c |
| 10-3 |
milli |
m |
| 10-6 |
micro |
µ |
| 10-9 |
nano |
n |
| 10-12 |
pico |
p |
| 10-15 |
femto |
f |
| 10-18 |
atto |
a |
| Geometrical |
| Symbol |
Quantity |
Symbol |
Unit Name |
| l,s |
length, distance |
m |
meter |
| A |
area |
m2 |
square meter |
| V |
volume |
m3 |
cubic meter |
| a, ß, ?, etc. |
plane angle |
rad |
radian |
| |
|
° |
degree |
| a, ß, ?, etc. |
solid angle |
|
steradian |
| Time-Related |
| Symbol |
Quantity |
Unit Symbol |
Unit name |
| t |
time |
s |
second |
| t |
time constant |
s |
second |
| u,v |
velocity |
ms-1 |
meter per second |
| a |
acceleration |
ms-2 |
meter per second per second |
| ? |
angular velocity |
rad s-1 |
radian per second |
| a |
angular acceleration |
rad s-2 |
radian per second per second |
| f |
frequency |
Hz |
Hertz |
| n |
rotational frequency |
s-1 |
(revolution) per second |
| Mechanical |
| Symbol |
Quantity |
Unit Symbol |
Unit name |
| m |
mass |
kg |
kilogram |
| F |
force |
N |
Newton |
| G (W) |
weight |
N |
Newton |
| J |
moment of inertia |
kgm2 |
kilogram meter squared |
| M (T) |
torque |
kgm |
kilogram meter |
| W (E) |
work (energy) |
J |
Joule |
| P |
power |
W |
Watt |
| p |
pressure |
Pa |
Pascal |
| E |
modulus of elasticity |
Pa |
Pascal |
| s |
stress |
Pa |
Pascal |
| ? |
density |
kgm-3 |
kilogram per cubic meter |
| dx |
rate of flow |
m3s-1 |
cubic meter per second |
| k, k1, etc. |
any constant factor |
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