INTRODUCTION
Abbreviation Measurements
Typical applications
Metric unit
Imperial unit
Name
Symbol
Name
Symbol
Area (Land area)
hectare
ha
acre
ac
square foot
ft²
square meter
m²
square inch
in²
square millimeter
mm²
square inch
in²
Electricity
ampere
A
ampere
A
volt
V
volt
V
microfarad
µF
microfarad
µF
ohm
Ω
ohm
Ω
Force
kilonewton
kN
pound
lb
newton
N
pound
lb
Force per length
newton per meter
N/m
pound per foot
lb/ft
pound per inch
lb/in
Frequency
megahertz
MHz
megahertz
MHz
kilohertz
kHz
kilohertz
kHz
hertz
Hz
hertz
Hz
Frequency − Rotational
r/min
r/min ª
revolution per minute
rpm
revolution per minute
rpm
Length
kilometer
km
mile
mi
meter
m
foot
ft
centimeter
cm
inch
in
millimeter
mm
inch
in
micrometer
µm
Mass
kilogram
kg
pound
lb
gram
g
ounce
oz
milligram
mg
Power
kilowatt
kW
horsepower
Hp
watt
W
Btu per hour
Btu/hr
Btu per minute
Btu/min
Pressure or stress (Force per area)
kilopascal
kPa
pound per square inch psi
inch of mercury
inHg
pascal
Pa
inch of water
inH2O
megapascal
MPa
pound per square inch psi
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