Conversion

[MIRCS]

How many microinches are there in 1 arc second

[Darrell]

More information is needed.    There isn't a direction conversion for this, because you're comparing apples and oranges.    However if you have a bubble level and it says something like .  0001/10 " then conversion can be done using trigonometry and the sine function.  .  .  . 

sin(x)= a/b

x=angle in degrees
a = height of inclination of the level, opposite side to angle being measured
b = length of hypotenuse

I believe you're looking for "a.  " 

If you have a 10 inch level, b = 10, it is your hypotenuse.