Quick unit index

Alphabetical overview of all metric units

 

Units and prefixes can be found in two places on this website:

All units and prefixes are listed in the tables. The tables provide a quick overview. They also provide a link to the in-depth information contained in the encyclopaedias.

The exceptions are obsolete and unofficial measurement units and prefixes. There are no encyclopaedia entries for these units. However, the table of obsolete units provides some additional information.

For an explanation about what base units, derived units, additional units, experimental units and prefixes are, please go to the beginning of the respective encyclopaedia pages. For a definition of obsolete units, please go to the beginning of the table of obsolete units.

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Unit name

Symbol

Classification

Go to

Go to

amp

amp

Obsolete unit

Table

 

ampere

A

Base unit

Table

Encyclopaedia

ångström

Å

Obsolete unit

Table

 

are

a

Obsolete unit

Table

 

astronomical unit

ua

Experimental unit

Table

 

bar

bar

Obsolete unit

Table

 

barn

b

Obsolete unit

Table

 

barye

ba

Obsolete unit

Table

 

becquerel

Bq

Derived unit

Table

Encyclopaedia

bel

B

Additional unit

Table

Encyclopaedia

biot

Bi

Obsolete unit

Table

 

calorie

cal

Obsolete unit

Table

 

candela

cd

Base unit

Table

Encyclopaedia

carat, metric

— see “metric carat”

-

-

-

 

coulomb

C

Derived unit

Table

Encyclopaedia

curie

Ci

Obsolete unit

Table

 

darcy

-

Obsolete unit

Table

 

day

d

Additional unit

Table

Encyclopaedia

debye

D

Obsolete unit

Table

 

degree absolute

°K

Obsolete unit

Table

 

degree Celsius

°C

Derived unit

Table

Encyclopaedia

degree Kelvin

°K

Obsolete unit

Table

 

degree of arc

°

Additional unit

Table

Encyclopaedia

denier

den

Obsolete unit

Table

 

dyne

dyn

Obsolete unit

Table

 

Electronvolt

eV

Experimental unit

Table

 

emu

-

Obsolete unit

Table

 

erg

erg

Obsolete unit

Table

 

farad

F

Derived unit

Table

Encyclopaedia

fermi

f

Obsolete unit

Table

 

franklin

Fr

Obsolete unit

Table

 

gal, galileo

Gal

Obsolete unit

Table

 

gamma

γ

Obsolete unit

Table

 

gauss

G

Obsolete unit

Table

 

gilbert

Gi

Obsolete unit

Table

 

gram

g

Sub-multiple
of base unit

Table

Encyclopaedia

gram of force per square centimeter

gf/cm²

Obsolete unit

Table

 

gray

Gy

Derived unit

Table

Encyclopaedia

hectare

ha

Obsolete unit

Table

 

henry

H

Derived unit

Table

Encyclopaedia

hertz

Hz

Derived unit

Table

Encyclopaedia

hour

h

Additional unit

Table

Encyclopaedia

jansky

Jy

Obsolete unit

Table

 

joule

J

Derived unit

Table

Encyclopaedia

katal

kat

Derived unit

Table

Encyclopaedia

kayser

K

Obsolete unit

Table

 

kelvin

K

Base unit

Table

Encyclopaedia

kilogram of force

kgf

Obsolete unit

Table

 

kilogram of force per square meter

kgf/m²

Obsolete unit

Table

 

kilogram

kg

Base unit

Table

Encyclopaedia

knot

-

Obsolete unit

Table

 

lambert

Lb

Obsolete unit

Table

 

langley

-

Obsolete unit

Table

 

line

li

Obsolete unit

Table

 

liter

l or L

Alternative spelling
of additional unit

Table

Encyclopaedia

litre

l or L

Additional unit

Table

Encyclopaedia

lumen

lm

Derived unit

Table

Encyclopaedia

lux

lx

Derived unit

Table

Encyclopaedia

maxwell

Mx

Obsolete unit

Table

 

meter of water column, meter H2O

m H2O

Obsolete unit

Table

 

meter

m

Alternative spelling
of base unit

Table

Encyclopaedia

metre

m

Base unit

Table

Encyclopaedia

metric carat

-

Obsolete unit

Table

 

micron

μ

Obsolete unit

Table

 

millimeter of mercury

mm Hg

Obsolete unit

Table

 

minute

min

Additional unit

Table

Encyclopaedia

minute of arc

′

Additional unit

Table

Encyclopaedia

mole

mol

Base unit

Table

Encyclopaedia

nautical mile

-

Obsolete unit

Table

 

neper

Np

Additional unit

Table

Encyclopaedia

new candle

cd

Obsolete unit

Table

 

newton

N

Derived unit

Table

Encyclopaedia

nox

nx

Obsolete unit

Table

 

oersted

Oe

Obsolete unit

Table

 

ohm

W

Derived unit

Table

Encyclopaedia

Paris point

-

Obsolete unit

Table

 

pascal

Pa

Derived unit

Table

Encyclopaedia

phot

ph

Obsolete unit

Table

 

poise

P

Obsolete unit

Table

 

pond

p

Obsolete unit

Table

 

rad

rad, rd

Obsolete unit

Table

 

radian

rad

Derived unit

Table

Encyclopaedia

rem

rem

Obsolete unit

Table

 

röntgen

R

Obsolete unit

Table

 

rutherford

Rd

Obsolete unit

Table

 

rydberg

-

Obsolete unit

Table

 

second of arc

″

Additional unit

Table

Encyclopaedia

second

s

Base unit

Table

Encyclopaedia

shoe size, metric or European

— see “Paris point”

-

 

 

 

siemens

S

Derived unit

Table

Encyclopaedia

sievert

Sv

Derived unit

Table

Encyclopaedia

standard atmosphere

atm

Obsolete unit

Table

 

steradian

sr

Derived unit

Table

Encyclopaedia

stere

s, st

Obsolete unit

Table

 

sthene

sn

Obsolete unit

Table

 

stilb

sb

Obsolete unit

Table

 

stoke, stokes

St

Obsolete unit

Table

 

tesla

T

Derived unit

Table

Encyclopaedia

tex

tex

Obsolete unit

Table

 

tonne

t

Additional unit

Table

Encyclopaedia

torr

Torr

Obsolete unit

Table

 

unified atomic mass unit

u

Experimental unit

Table

 

unit pole

-

Obsolete unit

Table

 

volt

V

Derived unit

Table

Encyclopaedia

watt

W

Derived unit

Table

Encyclopaedia

weber

Wb

Derived unit

Table

Encyclopaedia

X unit

XU, XE

Obsolete unit

Table

 

 

 

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