Unless otherwise noted, all units symbols here are in the form recognized by Trick.

GUNNS uses the official SI base units:

parameter	unit
length	m
mass	kg
time	s
electrical current	amp
temperature	K
amount of substance	mol

Combinations of parameters use the above units, thus mass density is kg/m3, volumetric flow rate is m3/s, etc.

Note that some derived units in GUNNS are not direct combinations of the base units:

parameter	unit	comments
angular velocity	rev/min	Official SI unit is radians per second (r/s) but GUNNS uses revolutions per minute (rev/min) or RPM for convenience.
frequency	Hz	Hz is not a Trick-recognized unit. In Trick, use (one/s) or (1/s)
force	N
pressure	kPa	Official SI unit for pressure is the pascal (Pa), but GUNNS uses the kilopascal (kPa) for convenience.
energy	J
power	W or J/s
electric charge	C	Coulombs © is not a Trick-recognized unit.
voltage	v
electric capacitance	F	Farads (F) is not a Trick-recognized unit
electric resistance	ohm
electric conductance	S	siemens (S) is not a Trick-recognized unit

The GUNNS “Basic” links can represent different units depending on which aspect they’re used in. For instance, a Basic Conductor’s (GunnsBasicConductor class) mFlux term represents electrical current (amp) in the electrical aspect, and heat flux (W) in the thermal aspect. To avoid conflicts with Trick, these terms have no Trick unit defined for them.