Base Physical quantity 
Symbol 
SI units 
Length 
l 
Meter (m) 
Mass 
m 
Kilogram(kg) 
Time 
t 
Sec(s) 
Temperature 
T 
Kelvin(K) 
Electric current 
I 
Ampere(A) 
Amount of Substance 
N 
Mole(M) 
Luminous intensity 
I_{v} 
Candela(cd) 
Physical Quantity 
Symbol 
Name 
Unit 
Mass 
m , M 
kilogram 
kg 
Linear position Length, Distance Radius 
x, r l, d R 
meter 
m 
Time 
t, 
second 
s 
Area 
A 
 
m^{2} 
Volume 
V 
 
m^{3} 
Density 

 
kg/m^{3} 
Linear velocity 
v, u, c 
 
m/s 
Linear momentum 
p 
 
kg*m/s 
Linear acceleration 
a 
 
m/s^{2} 
Force 
F 
newton 
N=kg*m/s^{2} 
Impulse 
I 
 
N*s 
Work Energy 
W E 
joule 
J=N*m 
Power 
P 
watt 
W=J/s 
Prefixes in SI system Multiple 
Prefix 
Symbol 
10^{12} 
pico 
p 
10^{9} 
nano 
n 
10^{6} 
micro 
μ 
10^{3} 
milli 
m 
10^{2} 
centi 
c 
10^{1} 
deci 
d 
10 
deca 
da 
10^{2} 
hecto 
h 
10^{3} 
kilo 
k 
10^{6} 
mega 
M 
10^{9} 
giga 
G 
10^{12} 
tera 
T 
1 cm^{3} 
1mL 
1000 mm^{3} 
1 Litre 
1000mL 
1000 cm^{3} 
1 m^{3} 
10^{6}cm^{3} 
1000 L 
1 dm^{3} 
1000 cm^{3} 
1 L 