QUANTITY

NAME

SYMBOL

length

metre

m

mass

kilogram

kg

time

second

s

electric current

ampere

A

thermodynamic temperature

kelvin

K

amount of substance

mole

mol

luminous intensity

candela

cd

QUANTITY

NAME

SYMBOL

plane angle

radian

Rad

solid angle

steradian

sr

QUANTITY

NAME

SYMBOL

DEFINITION

time

minute

min

1 min = 60 s

hour

h

1 h = 60 min = 3600 s

day

d

1 d = 24 h = 86400 s

plane angle

degree

?

1?= 1 (p/180) rad

minute

' 

1' (1/60)?= 2.909 x 10^-4 rad

second

"

1" (1/60)' = 4.848 x 10^-6 rad

volume

litre

l

1l = 1 dm³ = 10^-3 m³

mass

tonne

t

1 t = 1 Mg = l0³ kg