Physics SI derived units with special names and symbols

Derived quantity

Name

Symbol

Expression

in terms of

other SI units

Expression

in terms of SI base units

Plane angle

radian 

rad

  -

m·m^-1 = 1

solid angle

steradian 

sr

  -

m²·m^-2 = 1

frequency

hertz

Hz

  -

s^-1

force

newton

N

  -

m·kg·s^-2

pressure, stress

pascal

Pa

N/m²

m^-1·kg·s^-2

energy, work, quantity of heat  

joule

J

N·m

m²·kg·s^-2

power, radiant flux

watt

W

J/s

m²·kg·s^-3

electric charge, quantity of electricity

coulomb

C

  -

s·A

electric potential difference,

electromotive force

volt

V

W/A

m²·kg·s^-3·A^-1

capacitance

farad

F

C/V

m^-2·kg^-1·s⁴·A²

electric resistance

ohm

V/A

m²·kg·s^-3·A^-2

electric conductance

siemens

S

A/V

m^-2·kg^-1·s³·A²

magnetic flux

weber

Wb

V·s

m²·kg·s^-2·A^-1

magnetic flux density

tesla

T

Wb/m²

kg·s^-2·A^-1

inductance

henry

H

Wb/A

m²·kg·s^-2·A^-2

Celsius temperature

degree Celsius

°C

  -

K

luminous flux

lumen

lm

cd·sr 

m²·m^-2·cd = cd

illuminance

lux

lx

lm/m²

m²·m^-4·cd = m^-2·cd

Radio activity

becquerel

Bq

  -

s^-1

absorbed dose, specific energy (imparted), kerma

gray

Gy

J/kg

m²·s^-2

dose equivalent

sievert

Sv

J/kg

m²·s^-2

catalytic activity

katal

kat

s^-1·mol