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Mechanical Units - Metric & SAE

Here is a collection of some of the most often used mechanical units. Both SI (metric) and SAE (English) units are given.

There are two fundamental types of units: base units and derived units. Base units include meter, foot, kilogram, second, etc. Derived units involve a combination of base units, such as square meter,  kilometer/second, etc.











NameBase UnitSymbolBase UnitSymbol
Lengthmetermfootft
Areasquare meterm2square footft2
Volumecubic meterm3cubic footft3
Masskilogramkgpoundlb
Densitykilogram/cubic meterkg/m3pound/cubic footlb/ft3
Timesecondsseconds
Speedkilometer/secondkm/sfoot/secondft/s
ForcenewtonNpound-forcelbf
PressurepascalPpound/square footlb/ft2
Plane Angleradianraddegree°
Solid Anglesteradianstersquare degreedeg2
Momentumkilogram*meter/secondrpound*foot/secondr
Torquenewton/metertpound-force/foott
Young's moduluspascalEpascalE
Kinetic energyjouleKwatt*secondK
Potential energyjouleUwatt*secondU

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