Key:

* is multiply

^x is raised to the x power

The format is as follows (much of this is from inovativefunctions.com):

Initial_units / Desired_units / Multiply_by

acres/square

feet/43560

acres/square

miles/1.562*10^-3

ampere-hours/

coulombs/3600

angstrom units/

inches/3.937*10^-9

astronomical unit/

kilometers/1.495*10^8

atmospheres/

centimeters of

mercury/76

kilopascals/pounds per square inch/0.145

kilowatts/foot-ponds per second/737.6

kilowatts/

horsepower/1.341

kilowatt-hours/

BTU/3413

knots/feet per hour/6080

knots/

statute miles per hour/1.151