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.

Name |
Base Unit |
Symbol |
Base Unit |
Symbol |

Length |
meter |
m |
foot |
ft |

Area |
square meter |
m^{2} |
square foot |
ft^{2} |

Volume |
cubic meter |
m^{3} |
cubic foot |
ft^{3} |

Mass |
kilogram |
kg |
pound |
lb |

Density |
kilogram/cubic meter |
kg/m^{3} |
pound/cubic foot |
lb/ft^{3} |

Time |
second |
s |
second |
s |

Speed |
kilometer/second |
km/s |
foot/second |
ft/s |

Force |
newton |
N |
pound-force |
lbf |

Pressure |
pascal |
P |
pound/square foot |
lb/ft^{2} |

Plane Angle |
radian |
rad |
degree |
° |

Solid Angle |
steradian |
ster |
square degree |
deg^{2} |

Momentum |
kilogram*meter/second |
r |
pound*foot/second |
r |

Torque |
newton/meter |
t |
pound-force/foot |
t |

Young's modulus |
pascal |
E |
pascal |
E |

Kinetic energy |
joule |
K |
watt*second |
K |

Potential energy |
joule |
U |
watt*second |
U |