for all of you tinkerers ...

[grominou69]

here's a little program i found searching for something else ...
it's a Free User-friendly Windows Utility to easily convert between units of measurement. Includes Units for Temperature, Distance, Mass, Area, Volume, Pressure, Velocity, Acceleration, Force, Energy, Power, Fuel Consumption, Flow, Torque, Angles, Luminous Intensity, Illumination, Time & Radioactivity.
there's also a free scientific calculator on the same site ...

i tried it ... very easy to use ...
have fun ..

http://www.esbconsult.com/esbcalc/esbunitconv.htm

[Ydna]

hmmm, looks handy. I usually use my ti-83 for those type of things (the unit conversion that came built-in) but this might take a step off...

[FinchMan]

I just use: http://convertit.com/Go/ConvertIt/Me.../Converter.ASP