QUANTITY

NAME

SYMBOL

EXPRESSION

frequency

hertz

Hz

1 Hz = 1 s^-1

force

newton

N

1 N = I kg·m/s²

pressure

Pascal

Pa

1 Pa = 1 N/m²

energy, work,
quantity of heat

joule

J

1 J = 1 N·m

power

watt

W

1 W = 1 J/s

electric charge,
quantity of electricity

coulomb

C

1 C = 1 A·s

electric potential,
potential difference,
tension, electromotive force

volt

V

1 V = 1 J/C

electric capacitance

farad

F

1 F = I C/V

electric resistance

ohm

O

1 O = 1 V/A

electric conductance

siemens

S

1 S = 1Ø^-1

flux of magnetic induction,
magnetic flux

weber

Wb

1 Wb = 1 V·s

magnetic flux density,
magnetic induction

tesla

T

1 T = 1 Wb/m²

inductance

henry

H

1 H = 1 Wb/A

luminous flux

lumen

lm

1 Im = 1 cd·sr

illuminance

lux

Ix

1 Ix = 1 lm/m²

QUANTITY

UNIT NAME

UNIT

area

square metre

m2

volume

cubic metre

m3

speed, velocity

metre per second

m/s

acceleration

metre per second squared

m/s²

specific volume

cubic metre per kilogram

m³/kg

density, mass density

kilogram per cubic metre

kg/m³

luminance

candela per square metre

cd/m²

thermal conductivity

watt per metre kelvin

W/ (m× K)

specific energy

joule per kilogram

J/kg