ampere
ampere (turn)
ampere-hour
ampere per metre
angstrom apostilb
Symbol Notes
A SI unit of electric current.
At SI unit of magnetomotive force.
Ah
A m−1 SI unit of magnetic field strength.
ÚA1 ÚA = 10−10 m.
asb 1 asb(1/π)cd m−2 A unit of luminance. The SI unit, candela per square metre, is preferred.
atmosphere:
standard
atmosphere technical
atmosphere atomic mass unit (unified)
bam bar
baud
bel
bit
British thermal unit atm 1 atm = 101 325 N m−2.
u The (unified) atomic mass unit is defined as
one-twelfth of the mass of an atom of the 12C nuclide. Use of the old atomic mass unit (amu), defined by reference to oxygen, is deprecated.
b 1 b10−28 m2.
bar 1 bar = 100 000 N m−2. Bd Unit of signalling speed equal
Bq 1 Bq =1s−1. SI unit of radioactivity.
B
b
Btu
calorie (International Table calorie)
candela
candela per square inch
candela per square metre
candle
centimetre
circular mil
coulomb
cubic centimetre
cubic foot
cubic foot per minute cubic foot per second cubic inch
cubic metre
cubic metre per second cubic yard
curie
cycle
cycle per second decibel
degree (plane angle) calIT 1 calæ−= 4.1868 J. The 9th
Conf´ erence G´en´erale des Poids et Mesures adopted the joule as the unit of heat, avoiding the use of the calorie as far as possible.
cal 1 cal = 4.1840 J. (See note for International Table calorie.)
cd SI unit of luminous intensity. cd in−2 Use of the SI unit, candela per square metre, is
preferred.
cd m−2 SI unit of luminance. The
name nit has been used. The unit of luminous
intensity has been given
the name candela;use of
the word candle for this
purpose is deprecated. cm
cmil 1 cmil = (π/4)10−6 in2. C SI unit of electrical charge. cm3
ft3
ft3 min−1
ft3 s−1
in3
m3
m3 s−1
yd3
Ci Unit of activity in the field of
radiation dosimetry. c
c s−1 Deprecated. Use hertz. dB
degree (temperature): degree Celsius degree Fahrenheit
degree Kelvin degree Rankine dyne
electronvolt
erg
erlang
farad
foot
footcandle
foot per minute
foot per second
foot per second squared foot pound-force
gal
gallon
gigaelectronvolt
Note that there is no space æC between the symbol æ and æF the letter. The use of the
word centigrade of the Celsius temperature scale was abandoned by the Conf´erence G´en´erale des Poids et Mesures in 1948.
See Kelvin.
æR
dyn
eV
erg
E Unit of telephone traffic. F SI unit of capacitance. ft
fc Use of the SI unit of
illuminance, the lux (lumen per square metre), is preferred.
fL Use of the SI unit, the candela per square metre, is preferred.
ft min−1
ft s−1
ft s−2
ft lb f 2. =1cm s−Gal 1 Gal
gal The gallon, quart, and pint differ in the US and the
UK, and their use is
deprecated.
G The gauss is the
electromagnetic CGS
(Centimetre Gram Second)
unit of magnetic flux
density. The SI unit, tesla,
is preferred.
GeV
gigahertz gilbert
grain gram gray
henry
hertz
horsepower
inch
inch per second joule
joule per Kelvin
kiloelectronvolt kilogauss
kilogram
kilogram-force
kilohertz kilohm
kilojoule kilometre GHz
Gb The gilbert is the
electromagnetic CGS (Centimetre Gram Second) unit of magnetomotive force. Use of the SI unit, the ampere (or
ampere-turn), is preferred.
gr
g
Gy 1 Gy =1J kg−1. SI unit of
absorbed dose.
H
Hz SI unit of frequency.
hp Use of the SI unit, the watt,
is preferred.
h Time may be designated as in
the following example;
9h46m30s.
in
in s−1
J SI unit of energy.
J K−1 SI unit of heat capacity and
entropy.
K SI unit of temperature
(formerly called degree
Kelvin). The symbol K is
now used without the
symbolæ.
KeV
kG
kg SI unit of mass.
kgf In some countries the name
kilopond (kp) has been
adopted for this unit. kHz
k
kJ
km
kilometre per hour kilopond
kilovar
kilovolt
kilovoltampere
kilowatt
kilowatthour
knot
lambert
litre
litre per second
lumen
lumen per square foot
lumen per square metre lumen per watt
lumen second
lux
megaelectronvolt megahertz
megavolt
megawatt
megohm
metre
mho
microampere
microbar
km h−1
kp See kilogram-force.
kvar
kV
kVA
kW
kWh
kn 1 kn = 1 nmi h−1.
L The lambert is the CGS
(Centimetre Gram Second) unit of luminance. The SI unit, candela per square metre, is preferred.
l
l s−1
lm SI unit of luminous flux. lm ft−2 Use of the SI unit, the lumen
per square metre, is preferred.
lm m−2 SI unit of luminous excitance.
lm W−1 SI unit of luminous efficacy.
lm s SI unit of quantity of light.
lx 1 lx =1lm m−2.
SI unit of illuminance.
Mx The maxwell is the
electromagnetic CGS (Centimetre Gram Second) unit of magnetic flux. Use of the SI unit, the weber, is preferred.
MeV
MHz
MV
MW
M
m SI unit of length.
mho 1 mho = 1−1 =1S.
µA
µbar
microfarad microgram microhenry micrometre micron
microsecond
microwatt
mil
mile
nautical
statute
mile per hour
milliampere
millibar
milligal
milligram
millihenry
millilitre
millimetre
conventional millimetre of mercury
millimicron
millisecond
millivolt
milliwatt
minute (plane angle) minute (time)
nanoampere nanofarad
nanometre nanosecond nanowatt
nautical mile µF
µg
µH µm
The name micrometre (µm) is preferred.
µS
µW
mil 1 mil=−0.001 in.
nmi
mi
mi h−1
mA
mbar mb may be used.
mGal
mg
mH
ml
mm
mm Hg 1 mm Hg = 133.322 N m−2.
The name nanometre (nm) is preferred.
ms
mV
mW
...
min Time may be designated as in
9h46m30s.
mol SI unit of amount of
substance.
nA
nF
nm
ns
nW
nmi
neper
newton
newton metre
newton per square metre
nit
ohm
ounce (avoirdupois) pascal
picoampere picofarad picosecond picowatt
pint
pound
poundal
pound-force
pound-force feet
pound-force
per square inch
pound per square inch Np
N SI unit of force. Nm
N m−2 See pascal.
nt 1 nt =1cd m−2. See candela per square metre.
Oe The oersted is the
electromagnetic CGS (Centimetre Gram Second) unit of magnetic field strength. Use of the SI unit, the ampere per metre, is preferred.
SI unit of electrical
resistance.
oz
Pa SI unit of pressure or stress. 1Pa =1N m−2.
pA
pF
ps
pW
pt The gallon, quart, and pint differ in the US and the UK, and their use is deprecated.
lb
pdl
lbf
lbf ft
lbf in−2
Although use of the
abbreviation psi is common, it is not
recommended. See pound-force per square inch.
Quart
revolution per minute
revolution per second roentgen
second (plane angle) second (time)
siemens
square foot square inch square metre square yard steradian
stilb
tonne
(unified) atomic mass unit
var
volt
voltampere
watt
watthour
qt The gallon, quart, and pint
differ in the US and the UK, and their use is deprecated.
rd Unit of absorbed dose in the field of radiation dosimetry.
r min−1 Although use of the
abbreviation rpm is
common, it is not
recommended.
r s−1
R Unit of exposure in the field of radiation dosimetry.
...
s SI unit of time. Time may be designated as in the following example:
9h46m30s.
S SI unit of conductance. 1S = 1−1.
ft2
in2
m2
yd2
sr SI unit of solid angle.
sb 1 sb =1cd cm−2.ACGS unit of luminance. Use of the SI unit, the candela per square metre, is preferred.
T SI unit of magnetic flux density. 1 T =1Wb m−2.
t 1 t = 1000 kg.
u See atomic mass unit
(unified).
var Unit of reactive power.
V SI unit of electromotive force.
VA SI unit of apparent power.
W SI unit of power.
Wh
watt per steradian watt per steradian square metre weber
yard W sr−1 SI unit of radiant intensity. W(sr SI unit of radiance.
m2)−1Wb SI unit of magnetic flux. 1Wb =1Vs.
yd