SI Metric Symbols
Creating a safer standardized vocabulary
for equipment operators
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Creating a safer, standardized vocabulary for equipment operators
SI is the acronym for Système international d’unités, the metric system of measurement that has been
adopted worldwide. To ensure proper use and presentation, observe the following guidelines:
• Never place a period after an SI symbol, unless it is at the end of a sentence.
• A numeric value must always precede the SI symbol, and there must be a space between
the digit(s) and the symbol.
• Always present an SI symbol in its singular form. Never add an ‘s’ to the symbol to denote pluralization.
UNIT NAME
SYMBOL
ampere
bar
candela
candela per square meter
centimeter
coulomb
coulomb per square meter
coulomb per cubic meter
cubic centimeter
cubic meter cubic meter per kilogram
degree Celsius
farad
farad per meter
gram
hectare
hectopascal
henry
henry per meter
hertz
joule
joule per cubic meter
joule per kilogram
joule per kilogram kelvin
Joule per mole kelvin
kelvin
kilogram
kilogram per square meter
kilogram per cubic meter
kilohertz
kilojoule
kilometer
kilopascal
kilowatt
liter
lumen
lumen second
lux
meter
meter per second
meter per second squared
milliliter
millimeter
mole
mole per cubic meter
newton
newton meter
ohm
pascal
pascal second
radian
radian per second
radian per second squared
A
Electric current
barPressure/stress
cd
Luminous intensity
2
cd/m Luminance
cm
Length, width, distance, thickness, etc.
C
Electric charge, quantity of electricity
2
C/m Electric displacement field, polarization vector
C/m3
Electric charge density
cm3Volume
m3Volume
m3/kg
Specific volume
o
CTemperature
FCapacitance
F/m
Permittivity
gMass
ha
Area of land
hPaPressure/stress
HInductance
H/m
Permeability
HzFrequency
J
Energy, work, quantity of heat
J/m3
Energy density
J/kg
Specific energy
J/(kg·K)
Specific heat capacity, specific entropy
J/(mol·K)
Molar entropy, molar heat capacity
K
Thermodynamic temperature
kg
Mass or weight
2
kg/m Area density
kg/m3
Mass density
kHzFrequency
kJEnergy
kmDistance
kPaPressure/stress
kWPower
LVolume
lm
Luminous flux
lm·s
Luminous energy
lxIlluminance
m
Length, width, distance, thickness, etc.
m/s
Speed, velocity
m/s2Acceleration
mLVolume
mm
Length, width, distance, thickness, etc.
mol
Amount of substance
mol/m3
Amount of substance concentration
N
Force, weight
N·m
Moment of force
Ω
Electric resistance
PaPressure/stress
Pa·s
Dynamic viscosity
rad
Plane angle
rad/s
Angular velocity
Rad/s2
Angular acceleration
TYPE OF MEASUREMENT
second
siemens
siemens per meter
square meter
tesla
tonne
volt
volt per meter
watt
watt per meter kelvin
watt per square meter
weber
sTime
S
Electric conductance
S/m
Conductivity
m Area
T
Magnetic flux density
tMass
V
Electric potential difference
V/m
Electric field strength
W
Power, radiant flux
W/(m·K)
Thermal conductance
W/m2
Heat flux density, irradiance
Wb
Magnetic flux
T: 204.237.3737
n
F: 204.237.9997
E: [email protected]
n
n
TF: 1.877.445.3737
W: www.parentyreitmeier.com