[TCML] Copper wire resistance calculation ?

["Chris Swinson" <list@xxxxxxxxxxxxxxxxxxxxxxxxx>]

I am trying to calculate from lengh, dia, in inches to resistance.

I have

Rho = 0.0000000174 / 39.3700787 ( resistance per inch)

(4*WL*Rho)  /  (Math.sqrt(WD)*PI)

WL=wire length in inches
WD = Wire dia in inches.

Can't seem to get it to come out with any logical results. Could just be how 
I set it out, or its convertion cross sectional area wrong or something ?

thanks,
chris

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