Units

Strain

Dimensionless [mm/mm, in/in, or %]

Stress

The units of stress can be found in the table below.

Measure	SI units	Imperial units
Force	[\(\rm N\)]	[\(\rm lb\)]
Area	[\(\rm m^2\)]	[\(\rm in^2\)]
Stress	pascal = [\(\rm Pa\)] = [\(\rm N/m^2\)]	pound per square inch = [\(\rm psi\)] = [\(\rm lb/in^2\)]

It is also important to recall some of the most common prefixes used to denote quantity.

kilopascal [\(\rm kPa\)]	\(10^3\) [\(\rm Pa\)]
megapascal [\(\rm MPa\)]	\(10^6\) [\(\rm Pa\)]
gigapascal [\(\rm GPa\)]	\(10^9\) [\(\rm Pa\)]

Torsion

Force X distance [lb-in or N-m]