Units

Basic units of the SI

Magnitude

Name

Symbol

Length

meter

m

Mass

kilogram

kg

Time

second

s

Electric current

amper

A

Thermodynamic temperature

kelvin

K

Quantity of substance

mol

mol

Luminous intensity

candela

cd

Units derived from SI

Magnitude

Name

Symbol

Plane angle

radian

rad

Solid angle

steradian

sr

Frequency

hertz

Hz

Force

newton

N

Pressure, strain

pascal

Pa

Pressure, strain

atmosphere

atm

Energy, work, quantity of heat

joule

J

Energy

electronvolt

eV

Power, radiant flux

watt

W

Electric potential difference, electromotive force

volt

V

Capacitance

farad

F

Electrical resistance

ohm

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Electrical charge

coulomb

C

Electrical conductivity

siemens

S

Magnetic flux

weber

Wb

Magnetic flux density

tesla

T

Inductance

henry

H

Luminous flux

lumen

lm

Illuminance

lux

lx

Radioactivity

becquerel

Bq

Absorbed dose

gray

Gy

Equivalent dose

sievert

Sv

Catalytic activity

katal

Kat

Molar concentration

molar

M

Unit of mass

dalton

u

Units from other systems

Magnitude

Name

Symbol

Time

hour

h

Time

minute

min

Volume

liter

l

Pressure, strain

bar

b

Force

kilopond

kp

Length

yard

yd

Length

foot

ft

Length

inch

in

Length

mile

mi

Length

nautical mile

nmi

Volume

gallon

gal

Mass

ounce

oz

Mass

pound

lb

Volume

fluid ounce

floz

Volume

pint

pt