Hi,
I was trying to calculte the track width with PCB calcultor but i don’t think it is correct. what could be wrong with it ?
Are you sure your copper layer thickness is 0.035 mil?
This would be 0.889 µm
Could it be that you meant 0.035 mm = 35 µm?
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Your trace thickness of .035 mil is the problem. Standard 1oz Copper board is ~ 1.37mil. So this is more like a thin plating thickness.
Of course, you could avoid all this nonsense and just use sensible metric units …
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1 mil (imperial) = 0.0254 mm = 25.4 µm = 1.26262e-7 furlongs 
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0.035 is the default for mm. Changing the units does not cause the values to be converted, something that should be fixed in my opinion.
The 10 mil length should have been the first clue. 
And 1.80387e+12 furlongs/fornight = ??
(Besides enough characters to make a post.)
Dale
The width is what gets calculated. It is not an input
(The reason he asked is because this value did not make sense to him.)
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yes, thanks.
finally someone understood what I was trying to ask but the answers were quite helpful. 
again thanks everyone